1
by Behnke, Heinrich, Sommer, Friedrich
Published 1955
Springer Berlin Heidelberg

2
by Behnke, Heinrich, Sommer, Friedrich
Published 1962
Springer Berlin Heidelberg

4
by Behnke, Heinrich, Sommer, Friedrich
Published 1965
Springer Berlin Heidelberg

5
by Behnke, Heinrich
Published 1966
VS Verlag für Sozialwissenschaften