@book{Grap1993,
  author    = {Grap, Rolf Dietmar},
  title     = {Neue Formen der Arbeitsorganisation/2 (1993)},
  publisher = {Verl. der Augustinus-Buchh.},
  address   = {Aachen},
  isbn      = {3-86073-096-7},
  year      = {1993},
  language  = {de}
}
@book{Grap1992,
  author    = {Grap, Rolf Dietmar},
  title     = {Neue Formen der Arbeitsorganisation f{\"u}r die Stahlindustrie},
  publisher = {Augustinus-Buchhandlung Kerres},
  address   = {Aachen},
  isbn      = {3-86073-088-6},
  pages     = {VI, 256, 18 S. : graph. Darst.},
  year      = {1992},
  language  = {de}
}
@book{Grap1998,
  author    = {Grap, Rolf Dietmar},
  title     = {Produktion und Beschaffung: eine praxisorientierte Einf{\"u}hung},
  publisher = {Vahlen},
  address   = {M{\"u}nchen},
  isbn      = {3-8006-2321-8},
  pages     = {XVII, 344 S. : graph. Darst.},
  year      = {1998},
  language  = {de}
}
@book{Grap2002,
  author    = {Grap, Rolf Dietmar},
  title     = {Lernkultur Kompetenzentwicklung: neue Ans{\"a}tze zum Lernen im Beruf / Grap, Rolf [Hrsg.]},
  publisher = {Shaker},
  address   = {Aachen},
  isbn      = {3-8322-1042-3},
  pages     = {121 S. : graph. Darst.},
  year      = {2002},
  language  = {de}
}
@book{Grap2007,
  author    = {Grap, Rolf Dietmar},
  title     = {Business-Management f{\"u}r Ingenieure : beurteilen - entscheiden - gestalten / Rolf Grap (Hrsg.). - (REFA-Fachbuchreihe Unternehmensentwicklung)},
  publisher = {Hanser},
  address   = {M{\"u}nchen},
  isbn      = {978-3-446-41256-9},
  pages     = {XXI, 424 S. : graph. Darst.},
  year      = {2007},
  language  = {de}
}