1
by Kiefer, Hans, Koelzer, Winfried
Published 1992
Springer Berlin Heidelberg

2
by Kiefer, Hans, Koelzer, Winfried
Published 1987
Springer Berlin Heidelberg

3
by Kiefer, Hans, Koelzer, Winfried
Published 1986
Springer Berlin Heidelberg

4
by Bachner, Dietrich, Koelzer, Winfried, Müller, Dietrich
Published 1966
VS Verlag für Sozialwissenschaften