1
by Schmidt, Siegfried J.
Published 1968
Springer Netherlands

2
by Schmidt, Siegfried J., Barsch, Achim
Published 1981
VS Verlag für Sozialwissenschaften

3
by Hintzenberg, Dagmar, Schmidt, Siegfried J., Zobel, Reinhard
Published 1980
Vieweg+Teubner Verlag

4
by Schmidt, Siegfried J., Zobel, Reinhard
Published 1983
Vieweg+Teubner Verlag

5
by Rusch, Gebhard, Schmidt, Siegfried J.
Published 1983
Vieweg+Teubner Verlag