@article{KotterHammonRiekert1989,
  author    = {Kotter, Michael and Hammon, Ulrich and Riekert, Lothar},
  title     = {Gewinnung niedriger Olefine aus Methanol bei partiellem Umsatz mit R{\"u}ckf{\"u}hrung / U. Hammon ; M. Kotter ; L. Riekert},
  series = {Chemie - Ingenieur - Technik. 61 (1989), H. 2},
  journal   = {Chemie - Ingenieur - Technik. 61 (1989), H. 2},
  isbn      = {0009-286X},
  pages     = {151 -- 152},
  year      = {1989},
  language  = {de}
}
@article{Bruessermann1989,
  author    = {Br{\"u}ssermann, Klaus},
  title     = {H3 and C14 air monitoring according to KTA 1503.1},
  series = {2. Karlsruhe international conference on analytical chemistry in nuclear technology, Karlsruhe (Germany), 5-9 Jun 1989},
  journal   = {2. Karlsruhe international conference on analytical chemistry in nuclear technology, Karlsruhe (Germany), 5-9 Jun 1989},
  pages     = {223},
  year      = {1989},
  language  = {en}
}
@article{Bullerschen1989,
  author    = {Bullerschen, Klaus-Gerd},
  title     = {Hochtemperaturtechnik. Interne Arbeitssitzung des GVC-Fachausschusses 'Hochtemperaturtechnik'},
  series = {Chemie Ingenieur Technik. 61 (1989), H. 6},
  journal   = {Chemie Ingenieur Technik. 61 (1989), H. 6},
  isbn      = {0009-286X},
  pages     = {510 -- 512},
  year      = {1989},
  language  = {de}
}
@article{Gebhardt1989,
  author    = {Gebhardt, Andreas},
  title     = {H{\"a}rten von Kurbelwellen},
  pages     = {1 -- 14},
  year      = {1989},
  language  = {de}
}
@article{HillenRuppSchiebeletal.1989,
  author    = {Hillen, Walter and Rupp, S. and Schiebel, U. and Zaengel, Thomas T.},
  title     = {Imaging performance of a selenium-based detector for high-resolution radiography},
  series = {Medical Imaging III: Image Formation},
  journal   = {Medical Imaging III: Image Formation},
  isbn      = {0-8194-0125-0},
  pages     = {296},
  year      = {1989},
  language  = {en}
}
@book{Fassbender1989,
  author    = {Faßbender, Heinz},
  title     = {Implementierung der Call-by-Need Auswertungsstrategie f{\"u}r Macro Tree-to-String Transducer auf Nested-Stack Maschinen mit geschachtelten Ausgabeb{\"a}ndern},
  address   = {Aachen},
  year      = {1989},
  language  = {de}
}
@article{SchaeferMende1989,
  author    = {Sch{\"a}fer, Horst and Mende, H. H.},
  title     = {Interaction between laminated g.o.3\% SiFe sheets due to gap-stray fields and edge peaks},
  series = {Physica Scripta. 39 (1989), H. 3},
  journal   = {Physica Scripta. 39 (1989), H. 3},
  isbn      = {0031-8949},
  pages     = {397 -- 400},
  year      = {1989},
  language  = {en}
}
@article{HagemannGeittnerLeers1989,
  author    = {Hagemann, Hans-J{\"u}rgen and Geittner, P. and Leers, D.},
  title     = {Intrinsic scattering and absorption losses of Ge- and F-doped optical fibres prepared by PCVD. Geittner, P.; Hagemann, H. J. ; Leers, D.},
  series = {Electronics letters : an intern. publication / The Institution of Electrical Engineers. 25 (1989), H. 7},
  journal   = {Electronics letters : an intern. publication / The Institution of Electrical Engineers. 25 (1989), H. 7},
  isbn      = {0013-5194},
  pages     = {436 -- 437},
  year      = {1989},
  language  = {en}
}
@article{Lohse1989,
  author    = {Lohse, Wolfram},
  title     = {Kippnachweise nach DIN 4114 und Entwurf DIN 18800 Teil 2 - ein Hinweis f{\"u}r die Praxis},
  series = {Schweissen und Schneiden : Fachzeitschrift f{\"u}r Schweißen und verwandte Verfahren / Hrsg.: DVS - Deutscher Verband f{\"u}r Schweißen und Verwandte Verfahren e.V.. 41 (1989), H. 9},
  journal   = {Schweissen und Schneiden : Fachzeitschrift f{\"u}r Schweißen und verwandte Verfahren / Hrsg.: DVS - Deutscher Verband f{\"u}r Schweißen und Verwandte Verfahren e.V.. 41 (1989), H. 9},
  isbn      = {0036-7184},
  pages     = {459 -- 462},
  year      = {1989},
  language  = {de}
}
@article{Pietsch1989,
  author    = {Pietsch, Wolfram},
  title     = {Konzepte und Instrumente f{\"u}r Organisation und Management evolution{\"a}rer Softwareentwicklungsprojekte},
  series = {Computergest{\"u}tzter Arbeitsplatz : M{\"u}nchen, 18. - 20. Oktober 1989 ; proceedings / M. Paul (Hrsg.) Bd. 2},
  journal   = {Computergest{\"u}tzter Arbeitsplatz : M{\"u}nchen, 18. - 20. Oktober 1989 ; proceedings / M. Paul (Hrsg.) Bd. 2},
  publisher = {Springer},
  address   = {Berlin [u.a.]},
  isbn      = {3-540-51822-3},
  pages     = {221 -- 231},
  year      = {1989},
  language  = {de}
}
@book{Gerhardt1989,
  author    = {Gerhardt, Hans Joachim},
  title     = {Lagersicherheit lose verlegter W{\"a}rmed{\"a}mmplatten auf Flachd{\"a}chern gegen Abheben durch Windeinwirkung : Abschlußbericht zum Forschungsvorhaben "Lose verlegte W{\"a}rmed{\"a}mmplatten" / H. J. Gerhardt ; K. K. Bofah ; C. Kramer},
  publisher = {IRB-Verl.},
  address   = {Stuttgart},
  pages     = {26, 3, 32 S. : Ill., graph. Darst., 30 cm},
  year      = {1989},
  language  = {de}
}
@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}
}