@book{FredebeulKreinDongesEckhoffetal.1998,
  author    = {Fredebeul-Krein, Markus and Donges, J{\"u}rgen and Eckhoff, Johann and Freytag, Andreas},
  title     = {Die Rolle des Staates in der globalisierten Wirtschaft / Donges, J{\"u}rgen B., Eekhoff, Johann; Fredebeul-Krein, Markus [u.a.]},
  publisher = {Lucius und Lucius},
  address   = {Stuttgart},
  isbn      = {3-8282-0058-3},
  pages     = {VI,320 S., graph. Darst., Tab.,},
  year      = {1998},
  language  = {de}
}
@book{KleemannKoboMeliss1983,
  author    = {Kleemann, Manfred and Kobo, Sylvestre and Meliß, Michael},
  title     = {Die Rolle des Waldes in der Energieversorgung von Entwicklungsl{\"a}ndern. - (Aktuelle Beitr{\"a}ge zur Energiediskussion ; Nr. 7. Spezielle Berichte der Kernforschungsanlage J{\"u}lich ; 233)},
  publisher = {Zentralbibliothek der Kernforschungsanlage J{\"u}lich},
  address   = {J{\"u}lich},
  pages     = {V, 123 S. : Ill., graph. Darst.},
  year      = {1983},
  language  = {de}
}
@book{NiethammerFissabre2017,
  author    = {Niethammer, Bernhard and Fissabre, Anke},
  title     = {Die Steiff Spielwarenfabrik in Giengen / Brenz : Ein unbekanntes Meisterwerk der fr{\"u}hen Moderne},
  publisher = {Geym{\"u}ller Verlag f{\"u}r Architektur},
  address   = {Aachen},
  isbn      = {978-3-943164-03-9},
  pages     = {64 S.},
  year      = {2017},
  language  = {de}
}
@book{Mistler1979,
  author    = {Mistler, Hans-Ludwig},
  title     = {Die Tragf{\"a}higkeit des am Endauflager unter rechtwinklig ausgeklingten Brettschichttr{\"a}gern},
  pages     = {II, 112 S. : graph. Darst.},
  year      = {1979},
  language  = {de}
}
@book{JanzEblingGottschalketal.1999,
  author    = {Janz, Norbert and Ebling, G{\"u}nther and Gottschalk, Sandra and Licht, Georg},
  title     = {Dienstleistungen in der Zukunft: Innovationsaktivit{\"a}ten im Dienstleistungssektor. Befragung 1998 / Janz, N., G. Ebling, S. Gottschalk, G. Licht und H. Niggemann},
  publisher = {ZEW Zentrum f{\"u}r Europ{\"a}ische Wirtschaftsforschung},
  address   = {Mannheim},
  year      = {1999},
  language  = {de}
}
@book{JanzEblingHippetal.1998,
  author    = {Janz, Norbert and Ebling, G{\"u}nther and Hipp, C. and Licht, Georg},
  title     = {Dienstleistungen in der Zukunft : Innovationsaktivit{\"a}ten im Dienstleistungssektor ; Befragung 1997 ; Kurzfassung / Janz, N., G. Ebling, C. Hipp, G. Licht und H. Niggemann},
  publisher = {ZEW Zentrum f{\"u}r Europ{\"a}ische Wirtschaftsf{\"o}rderung},
  address   = {Mannheim},
  year      = {1998},
  language  = {de}
}
@book{JanzEblingGottschalketal.2000,
  author    = {Janz, Norbert and Ebling, G{\"u}nther and Gottschalk, Sandra and Niggemann, Hiltrud},
  title     = {Dienstleistungen in der Zukunft: Innovationsaktivit{\"a}ten im Dienstleistungssektor. Ergebnisse der Erhebung 1999 / Janz, N., G. Ebling, S. Gottschalk und H. Niggemann},
  publisher = {ZEW Zentrum f{\"u}r Europ{\"a}ische Wirtschaftsforschung},
  address   = {Mannheim},
  year      = {2000},
  language  = {de}
}
@book{BenknerDavid2005,
  author    = {Benkner, Thorsten and David, Klaus},
  title     = {Digital Mobile Radio Systems (Nicht erschienen?)},
  publisher = {Wiley},
  isbn      = {0-471-97591-5},
  pages     = {500},
  year      = {2005},
  language  = {en}
}
@book{DavidBenkner1996,
  author    = {David, Klaus and Benkner, Thorsten},
  title     = {Digitale Mobilfunksysteme},
  publisher = {Teubner},
  address   = {Stuttgart},
  pages     = {XIII, 457 S graph. Darst., + 1 Kt.},
  year      = {1996},
  language  = {de}
}
@book{DavidBenkner2013,
  author    = {David, Klaus and Benkner, Thorsten},
  title     = {Digitale Mobilfunksysteme},
  number    = {Repr. 1996},
  publisher = {Vieweg \& Teubner},
  address   = {Wiesbaden},
  isbn      = {978-3-322-92768-2},
  pages     = {XIII, 458 S.},
  year      = {2013},
  language  = {de}
}
@book{BenknerDavid1999,
  author    = {Benkner, Thorsten and David, Klaus},
  title     = {Digitale Mobilfunksysteme : Grundlagen und aktuelle Systeme. - 2., aktualis. u. erw. Aufl.},
  publisher = {Teubner},
  address   = {Stuttgart},
  isbn      = {3-519-16181-8},
  pages     = {XIII, 457 S.. : graph. Darst.},
  year      = {1999},
  language  = {en}
}
@book{Seehausen2008,
  author    = {Seehausen, Gerhard},
  title     = {Digitale Signalverarbeitung : Grundlagen / Gerhard H. F. Seehausen},
  publisher = {Mainz},
  address   = {Aachen},
  isbn      = {3-86130-604-2},
  pages     = {104 S. : graph. Darst.},
  year      = {2008},
  language  = {de}
}
@book{PfeifferKnepper1998,
  author    = {Pfeiffer, Johann and Knepper, Ludger},
  title     = {Diplom Ingenieur/Diplom Ingenieurin (Fachhochschule) Maschinenbau Konstruktionstechnik},
  publisher = {Bertelsmann},
  address   = {Bielefeld},
  pages     = {Losebl.-Ausg.},
  year      = {1998},
  language  = {de}
}
@book{KnepperPfeiffer1999,
  author    = {Knepper, Ludger and Pfeiffer, Johann},
  title     = {Diplom-Ingenieur / Diplom-Ingenieurin (Fachhochschule) Maschinenbau, Energie- und W{\"a}rmetechnik},
  publisher = {Bertelsmann},
  address   = {Bielefeld},
  pages     = {Loseblattausg.},
  year      = {1999},
  language  = {de}
}
@book{Baatz1981,
  author    = {Baatz, Udo},
  title     = {Diplom-Ingenieur / Diplom-Ingenieurin an Fachhochschulen: Fachrichtung Maschinenbau : Stand: Dezember 1980},
  publisher = {Bertelsmann},
  address   = {Bielefeld},
  pages     = {31 S., Beil.},
  year      = {1981},
  language  = {de}
}
@book{PfeifferKnepper1995,
  author    = {Pfeiffer, Johann and Knepper, Ludger},
  title     = {Diplom-Ingenieur/Diplom-Ingenieurin ( Fachhochschule ) Maschinenbau - Allgemeiner Maschinenbau},
  publisher = {Bertelsmann},
  address   = {Bielefeld},
  pages     = {Losebl.-Ausg.},
  year      = {1995},
  language  = {de}
}
@book{KnepperPfeiffer1995,
  author    = {Knepper, Ludger and Pfeiffer, Johann},
  title     = {Diplom-Ingenieur/Diplom-Ingenieurin (Fachhochschule) Maschinenbau - Allgemeiner Maschinenbau},
  publisher = {Bertelsmann},
  address   = {Bielefeld},
  pages     = {Loseblattausg.},
  year      = {1995},
  language  = {de}
}
@book{PfeifferKnepper1999,
  author    = {Pfeiffer, Johann and Knepper, Ludger},
  title     = {Diplom-Ingenieur/Diplom-Ingenieurin (Fachhochschule) Maschinenbau Energie- und W{\"a}rmetechnik},
  publisher = {Bertelsmann},
  address   = {Bielefeld},
  pages     = {Losebl.-Ausg.},
  year      = {1999},
  language  = {de}
}
@book{KnepperPfeiffer1998,
  author    = {Knepper, Ludger and Pfeiffer, Johann},
  title     = {Diplom-Ingenieur/Diplom-Ingenieurin (Fachhochschule) Maschinenbau Konstruktionstechnik},
  publisher = {Bertelsmann},
  address   = {Bielefeld},
  pages     = {Loseblattausg.},
  year      = {1998},
  language  = {de}
}
@book{Schuermann1992,
  author    = {Sch{\"u}rmann, Wilhelm},
  title     = {Dirty data : Sammlung Sch{\"u}rmann / Konzeption, Gestaltung und Organisation des Ausstellung sowie der Kataloges Wilhelm Sch{\"u}rmann},
  address   = {Aachen},
  pages     = {134 S. : {\"u}berw. Ill.},
  year      = {1992},
  language  = {de}
}