1
by Flitsch, Wilhelm
Published 1999
Springer Berlin Heidelberg

2
by Flitsch, Wilhelm
Published 1994
Springer Berlin Heidelberg

3
by Valters, Raimonds E., Flitsch, Wilhelm
Published 1985
Springer US

4
by Flitsch, Wilhelm, Heidhues, R., Peters, H., Gerstmann, E.
Published 1972
VS Verlag für Sozialwissenschaften