@article{Mayer1989,
  author    = {Mayer, Claudia},
  title     = {Elf Tage Schweigen. Bericht zu Buddhismus und Meditation in Thailand},
  series = {Frankfurter Allgemeine Zeitung (1989)},
  journal   = {Frankfurter Allgemeine Zeitung (1989)},
  pages     = {R5 -- R6},
  year      = {1989},
  language  = {de}
}
@article{KotterRiekertTurek1989,
  author    = {Kotter, Michael and Riekert, Lothar and Turek, Thomas},
  title     = {Entfernung von Ammoniak aus Abw{\"a}ssern durch Strippung und Sorption an Zeolithen : [Synopse 1724]},
  series = {Chemie - Ingenieur - Technik. 61 (1989), H. 1},
  journal   = {Chemie - Ingenieur - Technik. 61 (1989), H. 1},
  isbn      = {0009-286X},
  pages     = {74 -- 75},
  year      = {1989},
  language  = {de}
}
@book{Stephan1989,
  author    = {Stephan, J{\"u}rgen},
  title     = {Entscheidungsorientierte Wechselkurssicherung},
  publisher = {Eul},
  address   = {Bergisch Gladbach [u.a.]},
  isbn      = {3-89012-153-5},
  pages     = {III, 165 S. : graph. Darst.},
  year      = {1989},
  language  = {de}
}
@article{FoersterRizziLueth1989,
  author    = {F{\"o}rster, Arnold and Rizzi, Angela and L{\"u}th, H.},
  title     = {Epitaxial growth and characterization of Si/NiSi2/Si(111) heterostructures / Angela Rizzi ; A. F{\"o}rster ; H. L{\"u}th},
  series = {Surface Science. 211 - 212 (1989)},
  journal   = {Surface Science. 211 - 212 (1989)},
  isbn      = {0039-6028},
  pages     = {620 -- 629},
  year      = {1989},
  language  = {en}
}
@article{HelsperMoelter1989,
  author    = {Helsper, Christoph and M{\"o}lter, L.},
  title     = {Erzeugung von Pr{\"u}faerosolen f{\"u}r die Kalibrierung von optischen Partikelmeßverfahren nach VDI 3491},
  series = {Technisches Messen. 56 (1989)},
  journal   = {Technisches Messen. 56 (1989)},
  isbn      = {0171-8096},
  pages     = {229 -- 234},
  year      = {1989},
  language  = {en}
}
@article{FoersterLayetLueth1989,
  author    = {F{\"o}rster, Arnold and Layet, J. M. and L{\"u}th, H.},
  title     = {Evaluation of dopant profiles and diffusion constants by means of electron energy loss spectroscopy},
  series = {Applied Surface Science. 41 - 42 (1989)},
  journal   = {Applied Surface Science. 41 - 42 (1989)},
  isbn      = {0169-4332},
  pages     = {306 -- 311},
  year      = {1989},
  language  = {en}
}
@article{PietschKurbel1989,
  author    = {Pietsch, Wolfram and Kurbel, Karl},
  title     = {Expertensystem-Projekte. Entwicklungsmethodik, Organisation und Management / Kurbel, K., Pietsch, W.},
  series = {Informatik-Spektrum. 12 (1989), H. 2},
  journal   = {Informatik-Spektrum. 12 (1989), H. 2},
  isbn      = {0170-6012},
  pages     = {133 -- 146},
  year      = {1989},
  language  = {de}
}
@article{HelsperMoelterKaminski1989,
  author    = {Helsper, Christoph and M{\"o}lter, W. and Kaminski, S.},
  title     = {Fast and Automated Testing of Different Air Filter Media / M{\"o}lter, W. ; Helsper, C. ; Kaminski, S.},
  series = {1. Europ{\"a}isches Symposium Partikelabscheidung aus Gasen : [PARTEC, N{\"u}rnberg, West Germany, 19. - 21. April 1989 ; preprints] = 1. European Symposium Separation of Particles from Gases / [Organisation und Durchf{\"u}hrung: N{\"u}rnbergMesse]. Hrsg. von: Friedrich L{\"o}ffler},
  journal   = {1. Europ{\"a}isches Symposium Partikelabscheidung aus Gasen : [PARTEC, N{\"u}rnberg, West Germany, 19. - 21. April 1989 ; preprints] = 1. European Symposium Separation of Particles from Gases / [Organisation und Durchf{\"u}hrung: N{\"u}rnbergMesse]. Hrsg. von: Friedrich L{\"o}ffler},
  publisher = {N{\"u}rnbergMesse},
  address   = {N{\"u}rnberg},
  pages     = {441 -- 457},
  year      = {1989},
  language  = {en}
}
@article{HelsperMoelterKaminski1989,
  author    = {Helsper, Christoph and M{\"o}lter, W. and Kaminski, S.},
  title     = {Fast and Automated Testing of Different Air Filter Media / M{\"o}lter, W. ; Helsper, C. ; Kaminski, S.},
  series = {Proceedings of the Filtech Conference, Karlsruhe 1989, Vol. 1},
  journal   = {Proceedings of the Filtech Conference, Karlsruhe 1989, Vol. 1},
  publisher = {Filtration Society},
  address   = {Oadby},
  pages     = {125 -- 136},
  year      = {1989},
  language  = {en}
}
@article{Lassonczyk1989,
  author    = {Lassonczyk, Beate},
  title     = {Fossile Bodenbildung in Nord-Somalia},
  series = {Mitteilungen der Deutschen Bodenkundlichen Gesellschaft. 59 (1989), H. 2},
  journal   = {Mitteilungen der Deutschen Bodenkundlichen Gesellschaft. 59 (1989), H. 2},
  isbn      = {0343-107x},
  pages     = {927 -- 930},
  year      = {1989},
  language  = {de}
}