1
2
Published: Köln : Pahl-Rugenstein, 1970
Book
3
Book
4
5
Book
6
7
8
10
11
12
Book
13
14
Published: Oer-Erkenschwick : Archiv der Arbeiterjugendbewegung, 1991
Book
15
Published: Berlin : Duncker & Humblot, 1993
Book
16
17
18
Book
19
Published: Berlin : Trafo-Verl. Weist, 2001
Book
20
Published: Berlin : Rütten & Loening, 1960
Book