1
by Schumann, Herbert, Schumann, Ingeborg
Published 1987
Springer Berlin Heidelberg

2
by Schumann, Herbert, Schumann, Ingeborg
Published 1986
Springer Berlin Heidelberg

3
by Schumann, Herbert, Schumann, Ingeborg
Published 1990
Springer Berlin Heidelberg

4
by Schumann, Herbert, Schumann, Ingeborg
Published 1988
Springer Berlin Heidelberg