@book{OPUS4-1635,
  title     = {Joseph Beuys : Natur, Materie, Form},
  editor    = {Zweite, Armin},
  publisher = {Schirmer/Mosel},
  address   = {M{\"u}nchen [u.a.]},
  isbn      = {3-88814-453-1},
  pages     = {360 S. : {\"u}berw. Ill.},
  year      = {1991},
  language  = {de}
}
@article{AletseeBaumann1991,
  author    = {Aletsee, Ludwig and Baumann, Marcus},
  title     = {A laboratory incubator equipped with facilities to automatically simulate natural irradiance},
  series = {Boletim do Instituto Oceanogr{\´a}fico / Universidade de S{\~a}o Paulo},
  volume    = {Vol. 39},
  journal   = {Boletim do Instituto Oceanogr{\´a}fico / Universidade de S{\~a}o Paulo},
  number    = {No. 2},
  issn      = {1982-436X; 0080-6331},
  pages     = {155 -- 159},
  year      = {1991},
  language  = {en}
}
@article{Alt1991,
  author    = {Alt, Helmut},
  title     = {Effektivzins und APR},
  series = {Die Bank : Zeitschrift f{\"u}r Bankpolitik und Bankpraxis},
  volume    = {Jg. 31},
  journal   = {Die Bank : Zeitschrift f{\"u}r Bankpolitik und Bankpraxis},
  number    = {H. 4},
  issn      = {0342-3182},
  pages     = {230 -- 231},
  year      = {1991},
  language  = {de}
}
@article{AnikAnik1991,
  author    = {Anik, Sabri and Anik, Salahaddin},
  title     = {Stand der Schweißtechnik in der T{\"u}rkei},
  series = {Schweißen und Schneiden : Fachzeitschrift f{\"u}r Schweißen und verwandte Verfahren},
  volume    = {43},
  journal   = {Schweißen und Schneiden : Fachzeitschrift f{\"u}r Schweißen und verwandte Verfahren},
  number    = {3},
  issn      = {0036-7184},
  pages     = {142 -- 145},
  year      = {1991},
  language  = {de}
}
@article{AnikTopuzTuncel1991,
  author    = {Anik, Sabri and Topuz, A. and Tuncel, H. S.},
  title     = {Einfluß der Parameter beim Diffusionsschweißen der St{\"a}hle X 210 Cr 12 und 25 MoCr 4 auf ihre mechanischen Eigenschaften},
  series = {Schweißen und Schneiden : Fachzeitschrift f{\"u}r Schweißen und verwandte Verfahren},
  volume    = {43},
  journal   = {Schweißen und Schneiden : Fachzeitschrift f{\"u}r Schweißen und verwandte Verfahren},
  number    = {6},
  issn      = {0036-7184},
  pages     = {341 -- 344},
  year      = {1991},
  language  = {de}
}
@article{ArtmannKellerHaasetal.1991,
  author    = {Artmann, Gerhard and Keller, U. and Haas, J. and Amort, U. and Zang, Werner and Karschies, S.},
  title     = {Technik und ausgew{\"a}hlte Applikationen eines Membranbioassays roter Blutzellen},
  series = {Biomedizinische Technik = Biomedical engineering. 36 (1991)},
  volume    = {36},
  journal   = {Biomedizinische Technik = Biomedical engineering. 36 (1991)},
  number    = {S1},
  isbn      = {0013-5585},
  pages     = {450 -- 451},
  year      = {1991},
  language  = {de}
}
@article{ArtmannMontanusTeitel1991,
  author    = {Artmann, Gerhard and Montanus, M. and Teitel, P.},
  title     = {Die photometrische Kapillaraggregation- ein neues Verfahren zur Messung der Erythrozytenaggregation. Montanus, M.; Artmann, Gerhard Michael; Teitel, P.},
  series = {Biomedizinische Technik = Biomedical engineering. 36 (1991)},
  journal   = {Biomedizinische Technik = Biomedical engineering. 36 (1991)},
  isbn      = {0013-5585},
  pages     = {213 -- 215},
  year      = {1991},
  language  = {de}
}
@article{ArtmannWitte1991,
  author    = {Artmann, Gerhard and Witte, Ch.},
  title     = {Expertensystem f{\"u}r Personal Computer zur Strukturbestimmung des Circulus Arteriosus Willisii mittels transkranieller Dopplersonografie. Witte, Ch.; Artmann, Gerhard Michael},
  series = {Biomedizinische Technik = Biomedical engineering. 36 (1991)},
  journal   = {Biomedizinische Technik = Biomedical engineering. 36 (1991)},
  isbn      = {0013-5585},
  pages     = {228 -- 230},
  year      = {1991},
  language  = {de}
}
@article{BaumannGradinger1991,
  author    = {Baumann, Marcus and Gradinger, R.},
  title     = {Distribution of Phytoplankton Communities in Relation to the Large Scale Hydrographical Regime in the Fram Strait 1984 / Gradinger, R. ; Baumann, M.E.M.},
  series = {Marine Biology. 111 (1991), H. 2},
  journal   = {Marine Biology. 111 (1991), H. 2},
  isbn      = {0025-3162},
  pages     = {311 -- 321},
  year      = {1991},
  language  = {en}
}
@article{BaumannHircheKattneretal.1991,
  author    = {Baumann, Marcus and Hirche, H.-J. and Kattner, G. and Gradinger, R.},
  title     = {Plankton distribution and the impact of copepod grazing on primary production in Fram Strait, Greenland Sea / Hirche, H.-J. ; Baumann, M.E.M. ; Kattner, G.; Gradinger, R.},
  series = {Journal of Marine Systems. 2 (1991), H. 3-4},
  journal   = {Journal of Marine Systems. 2 (1991), H. 3-4},
  isbn      = {0924-7963},
  pages     = {477 -- 494},
  year      = {1991},
  language  = {en}
}
@misc{BerndtHoeckerKuropkaetal.1991,
  author    = {Berndt, Heinz and H{\"o}cker, Hartwig and Kuropka, Rolf and Kinkel, Joachim},
  title     = {Silane coated inorganic materials for chromatography : United States Patent},
  publisher = {[The United States Patent and Trademark Office]},
  address   = {[Alexandria, VA u.a.]},
  pages     = {9 S. : graph. Darst.},
  year      = {1991},
  language  = {en}
}
@article{BienerSasse1991,
  author    = {Biener, Ernst and Sasse, T.},
  title     = {Altlasten-Bewertung bei Investitionsentscheidungen},
  series = {Bremer Unternehmer (1991)},
  journal   = {Bremer Unternehmer (1991)},
  pages     = {S. 27},
  year      = {1991},
  language  = {de}
}
@article{BienerSasse1991,
  author    = {Biener, Ernst and Sasse, T.},
  title     = {Herstellen von Deponieabdichtungen},
  series = {Standard-Abdichtungssysteme f{\"u}r Deponiebauwerke : Seminarunterlagen},
  journal   = {Standard-Abdichtungssysteme f{\"u}r Deponiebauwerke : Seminarunterlagen},
  publisher = {Haus der Technik, Essen},
  address   = {Essen},
  pages     = {1 -- 17},
  year      = {1991},
  language  = {de}
}
@misc{BiselliThoemmesWandrey1991,
  author    = {Biselli, Manfred and Th{\"o}mmes, J{\"o}rg and Wandrey, Christian},
  title     = {Verfahren und Vorrichtung zur Abtrennung von Ammonium aus w{\"a}ßrigen Fl{\"u}ssigkeiten [Europ{\"a}ische Patentanmeldung]},
  pages     = {1 -- 12},
  year      = {1991},
  language  = {de}
}
@article{BlomePriester1991,
  author    = {Blome, Hans-Joachim and Priester, W.},
  title     = {Big Bounce in the very early Universe},
  series = {Astronomy and Astrophysics. 250 (1991), H. 1},
  journal   = {Astronomy and Astrophysics. 250 (1991), H. 1},
  isbn      = {0004-6361},
  pages     = {43 -- 49},
  year      = {1991},
  language  = {en}
}
@book{BreitbachAhmedOver1991,
  author    = {Breitbach, Gerd and Ahmed, K. and Over, H.},
  title     = {Ermittlung von Sicherheitsabst{\"a}nden bei Kriechbelastung von Prim{\"a}rkreiskomponenten durch Simulation von Druckentlastungsst{\"o}rf{\"a}llen einer HTR-Anlage (SR 383) : Abschlußbericht},
  publisher = {Forschungszentrum J{\"u}lich, Zentralbibliothek},
  address   = {J{\"u}lich},
  pages     = {Getr. Z{\"a}hlung : Ill., graph. Darst.},
  year      = {1991},
  language  = {de}
}
@book{BreitbachWolters1991,
  author    = {Breitbach, Gerd and Wolters, Johannes},
  title     = {Sicherheitstechnische Untersuchungen zum St{\"o}rfallverhalten des HTR-100 : Erg{\"a}nzungsband mit vertiefenden Einzelbeitr{\"a}gen zum Bericht J{\"u}l-Spez-477 / J. Wolters ... G. Breitbach ...},
  publisher = {Forschungszentrum J{\"u}lich, Zentralbibliothek},
  address   = {J{\"u}lich},
  pages     = {Getr. Z{\"a}hlung : graph. Darst.},
  year      = {1991},
  language  = {de}
}
@article{BullerschenWilhelmi1991,
  author    = {Bullerschen, Klaus-Gerd and Wilhelmi, Herbert},
  title     = {Cooling of arc furnace electrodes with heat pipes},
  series = {Chemical Engineering \& Technology. 14 (1991), H. 1},
  journal   = {Chemical Engineering \& Technology. 14 (1991), H. 1},
  isbn      = {0930-7516},
  pages     = {45 -- 53},
  year      = {1991},
  language  = {en}
}
@book{Dienst1991,
  author    = {Dienst, Karl-Jakob},
  title     = {Formeln f{\"u}r das Weggr{\"o}ssenverfahren / K. J. Dienst. Fachhochschule Aachen, Fachbereich Bauingenieurwesen. [Hrsg.: Rektor der Fachhochschule Aachen mit Sozialwerk Bauh{\"u}tte e.V.]},
  publisher = {Fachhochschule Aachen, Fachbereich Bauingenieurwesen},
  address   = {Aachen},
  pages     = {100 S. : graph. Darst.},
  year      = {1991},
  language  = {de}
}
@inproceedings{DoerenKroeschel1991,
  author    = {D{\"o}ren, Horst-Peter and Kr{\"o}schel, R.},
  title     = {Plasma-Spritzen},
  series = {Schweisszusatzwerkstoffe : Fortschritte, Erfahrungen, Tendenzen. 2. Aachener Schweisstechnik-Kolloquium, 7. bis 8. M{\"a}rz 1991},
  booktitle = {Schweisszusatzwerkstoffe : Fortschritte, Erfahrungen, Tendenzen. 2. Aachener Schweisstechnik-Kolloquium, 7. bis 8. M{\"a}rz 1991},
  editor    = {Dilthey, Ulrich},
  publisher = {VDI-Verl.},
  address   = {D{\"u}sseldorf},
  isbn      = {3-18-140802-6},
  pages     = {147 -- 167},
  year      = {1991},
  language  = {de}
}