3
4
published 1985
Book
5
published 1984
Book Conference Proceedings
9
by Dohlus, Horst
published 1983
Book
10
by Felfe, Werner
published 1983
Book
11
by Verner, Paul
published 1982
Book Conference Proceedings
15
16
published 1980
Book
17
18
Book
19
by Honecker, Erich
published 1978
Book
20
by Herrmann, Joachim, Honecker, Erich
published 1978
Book