1
by Holznagel, Bernd
Published 2010
Gabler

2
by Stock, Martin, Röper, Horst, Holznagel, Bernd
Published 1997
Springer Berlin Heidelberg

3
by Schulz, Wolfgang, Seufert, Wolfgang, Holznagel, Bernd
Published 1999
VS Verlag für Sozialwissenschaften