@book{Schuermann1994,
  author    = {Sch{\"u}rmann, Wilhelm},
  title     = {Metropole : Themen zur Großstadt},
  address   = {Aachen},
  pages     = {170 Bl.},
  year      = {1994},
  language  = {de}
}
@book{Schuermann1994,
  author    = {Sch{\"u}rmann, Wilhelm},
  title     = {Pegel K{\"o}ln},
  publisher = {John},
  address   = {K{\"o}ln},
  isbn      = {3-88903-997-9},
  pages     = {143 S. : nur Ill.},
  year      = {1994},
  language  = {de}
}
@book{Schuermann1990,
  author    = {Sch{\"u}rmann, Wilhelm},
  title     = {Das n{\"o}tig},
  publisher = {Ed. Travers},
  address   = {Neuchatel},
  pages     = {121 S. : nur Ill.},
  year      = {1990},
  language  = {de}
}
@book{Siepmann1987,
  author    = {Siepmann, Thomas},
  title     = {Reibmomente in Zylinderrollenlagern f{\"u}r Planetenr{\"a}der},
  address   = {Bochum},
  isbn      = {3-89194-068-8},
  pages     = {279 S. : graph. Darst.},
  year      = {1987},
  language  = {de}
}
@book{GrundmannBommesFricke2003,
  author    = {Grundmann, Reinhard and Bommes, Leonard and Fricke, J{\"u}rgen},
  title     = {Ventilatoren},
  publisher = {Vulkan-Verlag},
  address   = {Essen},
  isbn      = {3-8027-3200-6},
  year      = {2003},
  language  = {de}
}
@book{SammHemme2004,
  author    = {Samm, Doris and Hemme, Heinrich},
  title     = {Physikalische Denksportaufgaben},
  publisher = {Klett},
  address   = {Stuttgart},
  isbn      = {3-12-772531-0},
  year      = {2004},
  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}
}
@book{Knepper2000,
  author    = {Knepper, Ludger},
  title     = {Staplereinsatzkonzept Rohstofflagerplatz einer Papierfabrik},
  address   = {FH Aachen},
  year      = {2000},
  language  = {de}
}
@book{Knepper2000,
  author    = {Knepper, Ludger},
  title     = {Konzeptentwicklung verkehrstechnische Organisation des Pfortenbereichs eines Industrieunternehmens},
  address   = {FH Aachen},
  year      = {2000},
  language  = {de}
}
@book{Willms1987,
  author    = {Willms, Herbert},
  title     = {Untersuchung der Wechselwirkung zwischen Str{\"o}mungsfeld und Reaktionsfront beim deflagrativen Abbrand von Kohlenwasserstoff-Luft-Gemischwolken},
  publisher = {VDI-Verl.},
  address   = {D{\"u}sseldorf},
  isbn      = {3-18-142719-5},
  pages     = {VII, 168 S. : Ill., graph. Darst.},
  year      = {1987},
  language  = {de}
}