1
2
3
4
5
Published: Bad Godesberg : Forschungsinstitut der Friedrich-Ebert-Stiftung, 1967
Book
6
7
Published: Wiesbaden u.a. : Akad. Verl.-Ges. Athenaion [u.a.]
Book
8
9
Published: Frankfurt am Main : Röderberg, 1981
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10
Published: Regensburg : Pustet, 1987
Book
11
12
13
Book
14
15
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