3
4
published 1985
Book
6
published 1984
Conference Proceedings Book
9
by Felfe, Werner
published 1983
Book
10
by Dohlus, Horst
published 1983
Book
11
by Verner, Paul
published 1982
Conference Proceedings Book
15
published 1980
Book
16
17
Book
18
19
by Herrmann, Joachim, Honecker, Erich
published 1978
Book
20
by Honecker, Erich
published 1978
Book