1
by Kautsky, Karl, 1854-1938
Published 1961
Book
2
by Robbe, Martin, 1932-
Published 1967
Book
4
Published 1997
Book
7
Published 1998
Book
11
by Brown, Peter, 1935-
Published 1996
Book
12
by Heer, Friedrich, 1916-1984
Published 2000
Book
13
Published 2004
Book
19
Book
20
Published 2008
Serial