161
by Phleps, Hermann
Published in Ostdeutsche Wissenschaft (1956)
Article
162
Article
163
164
165
166
169
by Jessen, Hans
Published in Ostdeutsche Wissenschaft (1956)
Article
170
Published in Ostdeutsche Wissenschaft (1961)
Article
177
Article
178
180
by Bittner, Konrad
Published in Ostdeutsche Wissenschaft (1959)
Article