1
by Gestring, Norbert
Published 2006
VS Verlag für Sozialwissenschaften

2
by Gestring, Norbert
Published 2014
Springer Fachmedien Wiesbaden

3
by Gestring, Norbert, Heine, Hartwig, Mautz, Rüdiger, Mayer, Hans-Norbert
Published 1997
Vieweg+Teubner Verlag