@book{AltensenAltSchumny1983,
  author    = {Altensen, Frank and Alt, Helmut and Schumny, Harald},
  title     = {Kryptologie (HP-41 C/CV) : Chiffrierung, Textverschl{\"u}sselung, Datenschutz, Morsealphabet (Vieweg-Programmbibliothek Taschenrechner ; 7) / Helmut Alt ; Harald Schumny [Hrsg.]},
  publisher = {Vieweg + Teubner},
  address   = {Wiesbaden},
  isbn      = {3-528-04256-7},
  pages     = {V, 92 S.},
  year      = {1983},
  language  = {de}
}
@misc{Polaczek1983,
  author    = {Polaczek, Christa},
  title     = {Kofaser - Kategorien und differentielle Algebren},
  publisher = {Math. Inst. der Univ.},
  address   = {Bonn},
  pages     = {178 S. : Anh.},
  year      = {1983},
  language  = {de}
}
@book{Anik1983,
  author    = {Anik, Sabri},
  title     = {Zum L{\"o}sungsverhalten von Sauerstoff in bin{\"a}ren Legierungen unter besonderer Ber{\"u}cksichtigung experimenteller Ergebnisse am System Kupfer-Sauerstoff-Wismut bei 1200 Grad C},
  number    = {Mikroform},
  pages     = {89, 28 S. ; 2 Mikrofiches 24x},
  year      = {1983},
  language  = {de}
}