1
Published: 1976
Book
2
Published: 1989
Book
3
Published: 1989
Book
4
Published: 1980
Book
5
Published: 1978
Book
6
Published: [post 1982]
Book
7
Published: [post 1985]
Manuscript
8
Published: 1991
Book
9
Published: 1993
Book
10
11
12
13
14
Published: 1992
Book
15
16
by Menzen, Karl-Heinz
Published: 1994
Book
17
by Decker, Celia Anita
Published: cop. 1988
Book
18
19
by Henerson, Marlene E.
Published: 1987
Book
20