@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} }