1
2
Book
3
4
Book
5
6
Published: Sonnenbühl : Wild, 1988.
Book
7
8
Published: Köln [u.a.] : Böhlau, 1998
Book
9
10
11
Published: Bonn : Pahl-Rugenstein, 1993
Book
12
Published: München [u.a.] : Piper, 1998.
Book
13