@article{SchaeferBoettcher1989,
  author    = {Sch{\"a}fer, Horst and B{\"o}ttcher, A.},
  title     = {Mapping of magnetic domain structures inside of ferromagnetic materials by X-ray topography},
  series = {Physica Status Solidi (A). 113 (1989)},
  journal   = {Physica Status Solidi (A). 113 (1989)},
  isbn      = {0031-8965},
  pages     = {551},
  year      = {1989},
  language  = {en}
}
@misc{SponagelGrafGross1989,
  author    = {Sponagel, Stefan and Graf, G{\"u}nter and Groß, Heinz},
  title     = {Method for manufacturing a sealing ring : United States Patent 4,861,536 ; date of patent: Aug. 12, 1989 / assignee: Firma Carl Freudenberg. Inventors: Gunter Graf ; Heinz Gross ; Stefan Sponagel},
  publisher = {[United States Patent and Trademark Office]},
  address   = {[Alexandria, VA]},
  pages     = {5 S. : Ill.},
  year      = {1989},
  language  = {en}
}
@misc{SponagelGrafGross1989,
  author    = {Sponagel, Stefan and Graf, G{\"u}nter and Groß, Heinz},
  title     = {Method for the manufacture of a sealing ring with a sealing lip having hydrodynamically acting return elements : United States Patent 4,850,097 ; date of patent: Jul. 25, 1989 / assignee: Firma Carl Freudenberg. Inventors: Gunter Graf ; Heinz Gross ; Stefan Sponagel},
  publisher = {[United States Patent and Trademark Office]},
  address   = {[Alexandria, VA]},
  pages     = {4 S. : Ill.},
  year      = {1989},
  language  = {en}
}
@article{Schaefer1989,
  author    = {Sch{\"a}fer, Horst},
  title     = {Modellrechnungen und Streufeldmessung: Eine M{\"o}glichkeit zur zerst{\"o}rungsfreien Kristallstruktur-Analyse von kornorientiertem Elektroblech aus Silizium-Eisen},
  series = {Elektrotechnik und Informationstechnik : e \& i. 106 (1989), H. 2},
  journal   = {Elektrotechnik und Informationstechnik : e \& i. 106 (1989), H. 2},
  isbn      = {0932-383X},
  pages     = {67 -- 71},
  year      = {1989},
  language  = {de}
}
@article{SaffeLodewiksHaasetal.1989,
  author    = {Saffe, P. and Lodewiks, J. and Haas, H.-J. and Feigel, H.-J. and Ulrich, H. and Mauer, J. and Ortwig, H. and Dahmann, Peter and Rotth{\"a}user, S. and Tao, J. and Ohlischl{\"a}ger, O. and Scholz, D. and Bergmann, M. and Anders, P.},
  title     = {Neues von ASB Antreiben - Steuern - Bewegen},
  series = {{\"O}lhydraulik und Pneumatik. Vol. 33 (1989), H. 7},
  journal   = {{\"O}lhydraulik und Pneumatik. Vol. 33 (1989), H. 7},
  issn      = {0341-2660},
  pages     = {550 -- 572},
  year      = {1989},
  language  = {de}
}
@article{LaackRefisch1989,
  author    = {Laack, Walter van and Refisch, A.},
  title     = {Neuralgic amyotrophy of the lumbar area. Case Report / Refisch, A. ; Laack, W. van},
  series = {Archives of Orthopaedic and Trauma Surgery. 108 (1989), H. 5},
  journal   = {Archives of Orthopaedic and Trauma Surgery. 108 (1989), H. 5},
  isbn      = {0936-8051},
  pages     = {329 -- 332},
  year      = {1989},
  language  = {en}
}
@incollection{MertensBecker1989,
  author    = {Mertens, Josef and Becker, K.},
  title     = {Numerical solution of flow equations : an aircraft designer's view},
  series = {Nonlinear hyperbolic equations - theory, computation methods, and applications : proceedings of the 2nd International Conference on Nonlinear Hyperbolic Problems, Aachen, FRG, March 14 to 18, 1988. - (Notes on Numerical Fluid Mechanics ; 24)},
  booktitle = {Nonlinear hyperbolic equations - theory, computation methods, and applications : proceedings of the 2nd International Conference on Nonlinear Hyperbolic Problems, Aachen, FRG, March 14 to 18, 1988. - (Notes on Numerical Fluid Mechanics ; 24)},
  editor    = {Ballmann, Josef},
  publisher = {Vieweg},
  address   = {Braunschweig},
  isbn      = {3-528-08098-1},
  doi       = {10.1007/978-3-322-87869-4_41},
  pages     = {403 -- 412},
  year      = {1989},
  abstract  = {Today the most accurate and cost effective industrial codes used in aircraft design are based on the full potential equation coupled with boundary layer equations. However, these are not capable to solve complicated three-dimensional problems of vortical flows and shocks. On the other hand Euler and Navier-Stokes codes are too expensive and not accurate enough for design purposes, especially in regard of drag and interference prediction. The reasons for these deficiencies are investigated and a way to overcome them by future developments is demonstrated.},
  language  = {en}
}
@article{Meliss1989,
  author    = {Meliß, Michael},
  title     = {Photovoltaik bietet gr{\"o}ßtes Potential. NRW-Forschungs- und Entwicklungsarbeiten bereits heute anerkennenswert},
  series = {Energie : das Magazin f{\"u}r Wirtschaft, Forschung, Technik, Umwelt. Bd. 41 (1989), H. 12},
  journal   = {Energie : das Magazin f{\"u}r Wirtschaft, Forschung, Technik, Umwelt. Bd. 41 (1989), H. 12},
  issn      = {0013-7359},
  pages     = {32 -- 41},
  year      = {1989},
  language  = {de}
}
@inproceedings{Baumann1989,
  author    = {Baumann, Marcus},
  title     = {Primary production and phytoplankton growth in the marginal ice zone of the Fram Strait and the interpretation of the field data with autecological experiments (Abstract)},
  series = {Oceanography and biology of Arctic seas : selected papers from the ICES Symposium on Marine Sciences of the Arctic and Subarctic Regions, held in Santander, 28 - 30 September 1987. (Rapports et proc{\`e}s-verbaux des r{\´e}unions / Conseil International pour l'Exploration de la Mer ; 188)},
  booktitle = {Oceanography and biology of Arctic seas : selected papers from the ICES Symposium on Marine Sciences of the Arctic and Subarctic Regions, held in Santander, 28 - 30 September 1987. (Rapports et proc{\`e}s-verbaux des r{\´e}unions / Conseil International pour l'Exploration de la Mer ; 188)},
  editor    = {Hempel, G.},
  publisher = {International Council for the Exploration of the Sea},
  address   = {Copenhagen},
  organization    = {Symposium on Marine Sciences of the Arctic and Subarctic Regions <1987, Santander>},
  pages     = {128},
  year      = {1989},
  language  = {en}
}
@book{Breitbach1989,
  author    = {Breitbach, Gerd},
  title     = {Proceedings of the Workshop on Structural Design Criteria for HTR : J{\"u}lich, 31. January - 1. February 1989 / ed.: G. Breitbach ... - Als Ms. gedr.},
  publisher = {Zentralbibliothek d. Kernforschungsanlage},
  address   = {J{\"u}lich},
  pages     = {VII, 548 S. : Ill., graph. Darst.},
  year      = {1989},
  language  = {en}
}
@incollection{KurbelPietsch1989,
  author    = {Kurbel, Karl and Pietsch, Wolfram},
  title     = {Projektmanagementebenen bei evolution{\"a}rer Softwareentwicklung},
  series = {Interaktive betriebswirtschaftliche Informations- und Steuerungssysteme},
  booktitle = {Interaktive betriebswirtschaftliche Informations- und Steuerungssysteme},
  editor    = {Kurbel, Karl and Mertens, Peter and Scheer, August W.},
  publisher = {De Gruyter},
  address   = {Berlin},
  isbn      = {3-11-012100-X},
  doi       = {10.1515/9783110847055-013},
  pages     = {261 -- 285},
  year      = {1989},
  language  = {de}
}
@article{Meliss1989,
  author    = {Meliß, Michael},
  title     = {Regenerative Energiequellen},
  series = {Brennstoff, W{\"a}rme, Kraft : BWK ; das Energie-Fachmagazin. Bd. 41 (1989), H. 4},
  journal   = {Brennstoff, W{\"a}rme, Kraft : BWK ; das Energie-Fachmagazin. Bd. 41 (1989), H. 4},
  issn      = {0006-9612 (Print) ; 1436-4883 (E-Journal)},
  pages     = {146 -- 151},
  year      = {1989},
  language  = {de}
}
@article{Meliss1989,
  author    = {Meliß, Michael},
  title     = {Regenerative Energiequellen. Technischer Stand und Wirtschaftlichkeit},
  series = {Energiewirtschaftliche Tagesfragen. Jg. 39 (1989), H. 1/2},
  journal   = {Energiewirtschaftliche Tagesfragen. Jg. 39 (1989), H. 1/2},
  issn      = {0013-743X ; 0720-6240},
  pages     = {18 -- 25},
  year      = {1989},
  language  = {de}
}
@article{Biener1989,
  author    = {Biener, Ernst},
  title     = {Sanierung von Altlasten},
  series = {Umweltschutz '89},
  journal   = {Umweltschutz '89},
  publisher = {Plus-Verl.},
  address   = {Saarlouis},
  pages     = {36 -- 38},
  year      = {1989},
  language  = {de}
}
@article{Benner1989,
  author    = {Benner, Joachim},
  title     = {Schwingungsbelastung von drehzahlgeregelten Antrieben mit Stromrichtermotoren},
  series = {Antriebstechnik : Konstruktion, Entwicklung und Anwendung von Antrieben und Steuerungen ; Organ der Forschungsvereinigung Antriebstechnik e.V.},
  volume    = {28},
  journal   = {Antriebstechnik : Konstruktion, Entwicklung und Anwendung von Antrieben und Steuerungen ; Organ der Forschungsvereinigung Antriebstechnik e.V.},
  number    = {12},
  publisher = {Vereinigte Fachverl.},
  address   = {Mainz},
  issn      = {0341-2652},
  pages     = {49 -- 54},
  year      = {1989},
  language  = {de}
}
@inproceedings{Benner1989,
  author    = {Benner, Joachim},
  title     = {Schwingungstechnische Dimensionierung von Maschinens{\"a}tzen mit Stromrichtermotoren},
  series = {Antriebstechnisches Kolloquium '89 : Maschinen- und Anlagen{\"u}berwachung ; Elemente der Antriebstechnik im System ; neue Konzepte in der Antriebstechnik. - (Reihe IME-Leitfaden)},
  booktitle = {Antriebstechnisches Kolloquium '89 : Maschinen- und Anlagen{\"u}berwachung ; Elemente der Antriebstechnik im System ; neue Konzepte in der Antriebstechnik. - (Reihe IME-Leitfaden)},
  editor    = {Peeken, Heinz},
  publisher = {Verl. T{\"U}V Rheinland},
  address   = {K{\"o}ln},
  issn      = {3-88585-639-5},
  pages     = {309 -- 333},
  year      = {1989},
  language  = {de}
}
@article{SammFaissnerHeinrigsetal.1989,
  author    = {Samm, Doris and Faissner, H. and Heinrigs, W. and Preussger, A.},
  title     = {Search for the two-photon decay of a light penetrating particle from a 590 MeV proton beam dump / Faissner, H.; Heinrigs, W.; Preussger, A.; Reitz, J.; Samm, D. [u.a.]},
  series = {Zeitschrift f{\"u}r Physik, C Particles and Fields. 44 (1989), H. 4},
  journal   = {Zeitschrift f{\"u}r Physik, C Particles and Fields. 44 (1989), H. 4},
  pages     = {557 -- 566},
  year      = {1989},
  language  = {en}
}
@article{Alt1989,
  author    = {Alt, Helmut},
  title     = {Sechsunddreißig Spielarten der Verrechung : die Behandlung von Tilgungs- und Zinszahlungen},
  series = {Frankfurter Zeitung : Blick durch die Wirtschaft : Zeitung f{\"u}r Finanzen, Steuern, Recht und Management},
  journal   = {Frankfurter Zeitung : Blick durch die Wirtschaft : Zeitung f{\"u}r Finanzen, Steuern, Recht und Management},
  pages     = {vom 12.9.1989},
  year      = {1989},
  language  = {de}
}
@article{KrauseSchuppeSaureetal.1989,
  author    = {Krause, Gregor and Schuppe, W.D. and Saure, M. and Andress, H.},
  title     = {Sensitive Analytische und Physikalische Verfahren zum Nachweis von Ver{\"a}nderungen in Platten und Kabelisolierungen aus Polyolefinen / W.D. Schuppe, M. Saure, H. Andress, K. M{\"o}ller, D. Meurer, G. Krause},
  series = {AEG Technische Mitteilungen (1989)},
  journal   = {AEG Technische Mitteilungen (1989)},
  year      = {1989},
  language  = {de}
}
@article{DiktaKurtzStute1989,
  author    = {Dikta, Gerhard and Kurtz, B. and Stute, W.},
  title     = {Sequential Fixed-Width Confidence Bands for Distribution Functions Under Random Censoring},
  series = {Metrika. 36 (1989)},
  journal   = {Metrika. 36 (1989)},
  isbn      = {0026-1335},
  pages     = {167 -- 176},
  year      = {1989},
  language  = {en}
}
@article{Grap1989,
  author    = {Grap, Rolf Dietmar},
  title     = {Softwareergonomie bei der Arbeit mit Großrechnern},
  series = {pro Ort (1989)},
  journal   = {pro Ort (1989)},
  pages     = {31},
  year      = {1989},
  language  = {de}
}
@article{KrauseMeurerKlee1989,
  author    = {Krause, Gregor and Meurer, D. and Klee, D.},
  title     = {Space charge formation related to the morphology of polymers},
  series = {IEEE Transaction on Electrical Insulation. Vol. 24 (1989), H. No. 3},
  journal   = {IEEE Transaction on Electrical Insulation. Vol. 24 (1989), H. No. 3},
  pages     = {215 -- 222},
  year      = {1989},
  language  = {en}
}
@article{KrauseGoettlichMoelleretal.1989,
  author    = {Krause, Gregor and G{\"o}ttlich, S. and M{\"o}ller, K. and Meurer, D.},
  title     = {Space Charge Phenomena in Partially Crystalline Polymers: On-Line Measurement of Charge Carrier Motion under High AC-Field Strength / G. Krause, S. G{\"o}ttlich, K. M{\"o}ller, D. Meurer},
  series = {Proceedings of the 3rd International Conference on Conduction and Breakdown in Solid Dielectrics : Trondheim, Norway ... 1989},
  journal   = {Proceedings of the 3rd International Conference on Conduction and Breakdown in Solid Dielectrics : Trondheim, Norway ... 1989},
  publisher = {IEEE},
  address   = {Piscataway, N.J.},
  pages     = {IX, 607 S.},
  year      = {1989},
  language  = {en}
}
@book{Rick1989,
  author    = {Rick, Heino},
  title     = {Steuerreform 1990 : alle {\"A}nderungen u. Auswirkungen f{\"u}r Unternehmen u. Selbst{\"a}ndige ; {\"A}nderungen u. Auswirkungen nach Problem- u. Sachbereichen ; Gesetzestext ; Was ist neu? ; Auswirkungen u. Beisp., Modellabrechnungen},
  publisher = {WEKA-Fachverl., Fachverl. f{\"u}r Gesch{\"a}ftsf{\"u}hrung u. Management},
  address   = {Kissing [u.a.]},
  pages     = {143 S. : graph. Darst.},
  year      = {1989},
  language  = {de}
}
@article{Alt1989,
  author    = {Alt, Helmut},
  title     = {Steuerreformgesetz 1990},
  series = {Elektrizit{\"a}tswirtschaft},
  volume    = {Bd. 88},
  journal   = {Elektrizit{\"a}tswirtschaft},
  number    = {H. 1/2},
  issn      = {0013-5496},
  pages     = {78 -- 83},
  year      = {1989},
  language  = {de}
}
@article{Alt1989,
  author    = {Alt, Helmut},
  title     = {Steuerreformgesetz 1990},
  series = {Elektrizit{\"a}tswirtschaft},
  volume    = {Jg. 88},
  journal   = {Elektrizit{\"a}tswirtschaft},
  number    = {H. 2},
  issn      = {0947-0581 (E-Journal); 0340-7918 (Print)},
  pages     = {120 -- 121},
  year      = {1989},
  language  = {de}
}
@article{SchaeferLampeyMende1989,
  author    = {Sch{\"a}fer, Horst and Lampey, H. and Mende, H. H.},
  title     = {Stray-field profile of single M-shaped Si-Fe transformer sheets and the resulting interaction in a stack},
  series = {Physica Scripta. 39 (1989), H. 4},
  journal   = {Physica Scripta. 39 (1989), H. 4},
  isbn      = {0031-8949},
  pages     = {520 -- 522},
  year      = {1989},
  language  = {en}
}
@article{KotterLintzRiekertetal.1989,
  author    = {Kotter, Michael and Lintz, Hans-G{\"u}nther and Riekert, Lothar and Trimm, D. L.},
  title     = {Structure and selectivity changes in vanadia-titania catalysts used to promote the reduction of nitric oxide with ammonia},
  series = {Applied catalysis. 52 (1989), H. 1},
  journal   = {Applied catalysis. 52 (1989), H. 1},
  isbn      = {0166-9834},
  pages     = {225 -- 235},
  year      = {1989},
  language  = {en}
}
@article{Hagemann1989,
  author    = {Hagemann, Hans-J{\"u}rgen},
  title     = {St{\"o}rstellengleichgewichte in eisendotierten Titanaten. Hagemann, H. J.},
  series = {Philips - Unsere Forschung in Deutschland / Hrsg.: Philips Forschungslaboratorium GmbH Aachen und Hamburg. 4 (1989)},
  journal   = {Philips - Unsere Forschung in Deutschland / Hrsg.: Philips Forschungslaboratorium GmbH Aachen und Hamburg. 4 (1989)},
  pages     = {170 -- 172},
  year      = {1989},
  language  = {de}
}
@book{Samm1989,
  author    = {Samm, Doris},
  title     = {Suche nach skalaren und pseudoskalaren Teilchen am Kernreaktor Merlin der KFA J{\"u}lich},
  pages     = {109 S. : graph. Darst.},
  year      = {1989},
  language  = {de}
}
@article{FoersterLueth1989,
  author    = {F{\"o}rster, Arnold and L{\"u}th, H.},
  title     = {Surface reactions of trimethylgallium and trimethylarsenic on silicon surfaces},
  series = {Journal of Vacuum Science \& Technology B: Microelectronics and Nanometer Structures. 7 (1989), H. 4},
  journal   = {Journal of Vacuum Science \& Technology B: Microelectronics and Nanometer Structures. 7 (1989), H. 4},
  isbn      = {1071-1023},
  pages     = {720 -- 724},
  year      = {1989},
  language  = {en}
}
@inproceedings{GerlingVogelsang1989,
  author    = {Gerling, Ulrich and Vogelsang, D.},
  title     = {Temperaturfeldberechnungen mit ASKA unter Ber{\"u}cksichtigung des Phasen{\"u}bergangs fest/fl{\"u}ssig},
  series = {FEM '89 Congress : International FEM-Congress, Baden-Baden, Federal Republic of Germany, 20./21. November 1989},
  booktitle = {FEM '89 Congress : International FEM-Congress, Baden-Baden, Federal Republic of Germany, 20./21. November 1989},
  publisher = {IKOSS},
  address   = {Stuttgart},
  pages     = {295 -- 314},
  year      = {1989},
  language  = {de}
}
@article{LauthSolomunHirschwaldetal.1989,
  author    = {Lauth, Jakob and Solomun, T. and Hirschwald, W. and Christmann, K.},
  title     = {The interaction of carbon monoxide with a ruthenium(1010) surface},
  series = {Surface Science. 210 (1989), H. 1-2},
  journal   = {Surface Science. 210 (1989), H. 1-2},
  isbn      = {0039-6028},
  pages     = {201 -- 224},
  year      = {1989},
  language  = {en}
}
@article{LauthSolomunHirschwaldetal.1989,
  author    = {Lauth, Jakob and Solomun, T. and Hirschwald, W. and Christmann, K.},
  title     = {The interaction of carbon monoxide with a ruthenium(1010) surface},
  series = {Surface Science Letters. 210 (1989), H. 1-2},
  journal   = {Surface Science Letters. 210 (1989), H. 1-2},
  isbn      = {0167-2584},
  pages     = {A74 -- A75},
  year      = {1989},
  language  = {en}
}
@article{KernLangWiesingeretal.1989,
  author    = {Kern, Alexander and Lang, U. and Wiesinger, J. and Zischank, Wolfgang J.},
  title     = {The longitudinal voltage of cable tubes with a screening mesh caused by partial lightning currents},
  series = {Proceedings / Sixth International Symposium on High Voltage Engineering : 28. August - 1. September, 1989, Westin Canal Place Hotel, New Orleans, Louisiana, USA},
  journal   = {Proceedings / Sixth International Symposium on High Voltage Engineering : 28. August - 1. September, 1989, Westin Canal Place Hotel, New Orleans, Louisiana, USA},
  publisher = {Mississippi State University},
  address   = {Mississippi State, Miss.},
  year      = {1989},
  language  = {en}
}
@article{SchererHessbergerGaeggeleretal.1989,
  author    = {Scherer, Ulrich W. and Heßberger, F. P. and G{\"a}ggeler, H. W. and Armbruster, P.},
  title     = {The New Nuclide 225U / F.P. Heßberger, H. G{\"a}ggeler, P. Armbruster, W. Br{\"u}chle, H. Folger, S. Hofmann, D. Jost, J.V. Kratz, M.E. Leino, G. M{\"u}nzenberg, V. Ninov, M. Sch{\"a}del, U.W. Scherer, K. S{\"u}mmerer, A. T{\"u}rler, D. Ackerman},
  series = {Zeitschrift f{\"u}r Physik A Hadrons and Nuclei. 333 (1989), H. 1},
  journal   = {Zeitschrift f{\"u}r Physik A Hadrons and Nuclei. 333 (1989), H. 1},
  isbn      = {0939-7922},
  pages     = {111 -- 112},
  year      = {1989},
  language  = {en}
}
@inproceedings{AnikFrohberg1989,
  author    = {Anik, Sabri and Frohberg, Martin G.},
  title     = {Thermodynamic behaviour of oxygen in molten metallic alloys},
  series = {Thermochemistry of alloys : recent developments of experimental methods ; [proceedings of the NATO Advanced Study Institute on Thermochemistry of Alloys, Recent Developments of Experimental Methods, Kiel, F.R.G., August 17 - 27, 1987]. - (NATO ASI series : Series C ; 286)},
  booktitle = {Thermochemistry of alloys : recent developments of experimental methods ; [proceedings of the NATO Advanced Study Institute on Thermochemistry of Alloys, Recent Developments of Experimental Methods, Kiel, F.R.G., August 17 - 27, 1987]. - (NATO ASI series : Series C ; 286)},
  editor    = {Brodowsky, Horst},
  publisher = {Springer},
  address   = {Dordrecht [u.a.]},
  isbn      = {0-7923-0434-9},
  pages     = {419 -- 428},
  year      = {1989},
  language  = {en}
}
@article{KaemperSchmittWesneretal.1989,
  author    = {K{\"a}mper, Klaus-Peter and Schmitt, W. and Wesner, D. A. and G{\"u}ntherodt, G.},
  title     = {Thickness dependence of the spin- and angle-resolved photoemission of ultrathin, epitaxial Ni(111)/W(110) layers},
  series = {Applied Physics A: Materials Science and Processing. 49 (1989), H. 6},
  journal   = {Applied Physics A: Materials Science and Processing. 49 (1989), H. 6},
  isbn      = {1432-0630},
  pages     = {573 -- 578},
  year      = {1989},
  language  = {en}
}
@article{Kern1989,
  author    = {Kern, Alexander},
  title     = {Time dependent temperature distribution in metal sheets caused by direct lightning strikes},
  series = {Proceedings / Sixth International Symposium on High Voltage Engineering : 28. August - 1. September, 1989, Westin Canal Place Hotel, New Orleans, Louisiana, USA},
  journal   = {Proceedings / Sixth International Symposium on High Voltage Engineering : 28. August - 1. September, 1989, Westin Canal Place Hotel, New Orleans, Louisiana, USA},
  publisher = {Mississippi State University},
  address   = {Mississippi State, Miss.},
  year      = {1989},
  language  = {en}
}
@book{Hegewald1989,
  author    = {Hegewald, Ulf},
  title     = {Ulf Hegewald : Skulpturen aus Ton 1985 - 89 / Text: Wolfgang Becker. Gestaltung: Ulf Hegewald},
  address   = {Aachen},
  pages     = {91 S. : {\"u}berw. Ill.},
  year      = {1989},
  language  = {de}
}
@book{Kettern1989,
  author    = {Kettern, J{\"u}rgen},
  title     = {Untersuchungen zur biologisch-chemisch-physikalischen Behandlung von Deponiesickerw{\"a}ssern},
  pages     = {XIV, 184 S. m. 72 Abb., 55 Tab., Anl.},
  year      = {1989},
  language  = {de}
}
@book{Scherer1989,
  author    = {Scherer, Ulrich W.},
  title     = {Untersuchungen zur Synthese und chemischen Charakterisierung sehr schwerer Elemente / Ulrich W. Scherer},
  publisher = {Gesellschaft f{\"u}r Schwerionenforschung mbH},
  address   = {Darmstadt},
  pages     = {123 S.},
  year      = {1989},
  language  = {de}
}
@article{Heinrichs1989,
  author    = {Heinrichs, Horst},
  title     = {Verbindung von CAD und CAE mittels der systemneutralen CAD I Schnittstelle},
  pages     = {391 -- 408},
  year      = {1989},
  language  = {de}
}
@misc{MangMaier1989,
  author    = {Mang, Thomas and Maier, Josef},
  title     = {Verfahren zur Herstellung einer haptenisierten Polysaccharidmatrix},
  publisher = {Deutsches Patent- und Markenamt},
  address   = {M{\"u}nchen},
  year      = {1989},
  language  = {de}
}
@book{Mang1989,
  author    = {Mang, Thomas},
  title     = {Verfahren zur Herstellung einer haptenisierten Polysaccharidmatrix},
  publisher = {Europ{\"a}isches Patentamt},
  address   = {M{\"u}nchen},
  year      = {1989},
  language  = {de}
}
@article{Blome1989,
  author    = {Blome, Hans-Joachim},
  title     = {Wie funktionieren die aktiven Kerne der Galaxien?},
  series = {Naturwissenschaften. 76 (1989), H. 7},
  journal   = {Naturwissenschaften. 76 (1989), H. 7},
  isbn      = {0028-1042},
  pages     = {310 -- 317},
  year      = {1989},
  language  = {de}
}
@article{Alt1989,
  author    = {Alt, Helmut},
  title     = {Zinsberechnung nach dem Sparbuch-Modell},
  series = {Frankfurter Zeitung : Blick durch die Wirtschaft : Zeitung f{\"u}r Finanzen, Steuern, Recht und Management},
  journal   = {Frankfurter Zeitung : Blick durch die Wirtschaft : Zeitung f{\"u}r Finanzen, Steuern, Recht und Management},
  pages     = {vom 22.3.1989},
  year      = {1989},
  language  = {de}
}
@article{GrundmannKramerGerhardt1989,
  author    = {Grundmann, Reinhard and Kramer, Carl and Gerhardt, Hans Joachim},
  title     = {Zonenabsaugung und Bel{\"u}ftung f{\"u}r eine Produktionshalle mit zeitweilig auftretender hoher Staubentwicklung},
  series = {DKV-Tagungsbericht, Deutscher K{\"a}lte- und Klimatechnischer Verein. 4 (1989)},
  journal   = {DKV-Tagungsbericht, Deutscher K{\"a}lte- und Klimatechnischer Verein. 4 (1989)},
  isbn      = {0172-8849},
  pages     = {981 -- 998},
  year      = {1989},
  language  = {de}
}
@article{SchaeferLampey1989,
  author    = {Sch{\"a}fer, Horst and Lampey, H.},
  title     = {Zum Einfluß der Streufeldkopplung auf die magnetischen Eigenschaften und den Wirkungsgrad handels{\"u}blicher Transformatorkerne aus kornorientierten Silizium-Eisen Elektroblechen},
  series = {Electrical Engineering (Archiv fur Elektrotechnik). 72 (1989), H. 6},
  journal   = {Electrical Engineering (Archiv fur Elektrotechnik). 72 (1989), H. 6},
  isbn      = {0948-7921},
  pages     = {395 -- 405},
  year      = {1989},
  language  = {de}
}
@article{Schaefer1989,
  author    = {Sch{\"a}fer, Horst},
  title     = {Zur Inhomogenit{\"a}t des inneren Feldes und der Flußdichte von kornorientierten Elektroblechen aus Silizium-Eisen bei Fehlorientierungen in der Blechebene},
  series = {Electrical Engineering (Archiv fur Elektrotechnik). 72 (1989), H. 1},
  journal   = {Electrical Engineering (Archiv fur Elektrotechnik). 72 (1989), H. 1},
  isbn      = {0948-7921},
  pages     = {51 -- 57},
  year      = {1989},
  language  = {de}
}