@book{CzechZoellnerSachsetal.1993, author = {Olaf Czech and Hermann Z{\"o}llner and Burkhard Sachs and Horst Ziefuss and Hans-Joachim Laabs}, title = {Lehrerbildung im Lernfeld Arbeitslehre}, editor = {Bernd Meier}, isbn = {3-89342-005-3}, year = {1993}, }