1
2
by Morris, Desmond.
Published 1978
3
by Sajeva, Maurizio.
Published 1994
4
5
Published 1991
6
by Hobert, Ingfried
Published 2001
7
Published 1986
8
by Simon, Lori A
Published 2005
9
Published 1979
10
Published 1995
11
Published 2001
12
by Cahill, Coleen
Published 2003
13
14
15
16
by Holder, Katy
Published 2005
17
by Holttum, R.E.
Published 1991
18
by Richarz, Klaus.
Published 1993
19
Published 1988
20
by Hanisch, Horst
Published 2000