6
by Trockij, Lev, 1879-1940
Published 1974
Book
9
by Leonhard, Wolfgang, 1921-2014
Published 1976
Book
11
by Peter, Manfred.
Published 2001
Book
15
by Kohn, Hans, 1891-1971
Published 1961
Book
16
by Handschin, Jacques, 1886-1955
Published 1924
Book
17
19
by Onasch, Konrad, 1916-2007
Published 1961
Book