1
Published: Weinheim : Beltz, 1974
Serial
2
Article
3
Published: Hamburg : Ergebnisse Verlag, 1991
Serial
4
Published: Weinheim : Beltz, 1978
Serial
5
Article
6
Published: Neuendettelsau : Freimund Verlag, 1981
Serial
7
Published: Weinheim : Beltz, 1980
Serial
8
Published: Weinheim : Beltz, 1980
Serial
9
Article
10
Published: Essen : Sutter, 1981
Serial
11
12
Article
13
Article
14
Published: Bonn : Bundeszentrale für Politische Bildung
Serial
15
16
17
18
19
Published: SWR WDR, 2005
20
Published: Phoenix, 2011