201
202
by Luhmann, Niklas (1927-1998)
Published: 1979
Manuscript
203
204
by Hörz, Herbert (1933-)
Published: 1977
Manuscript
205
by Szmatka, Jacek (1950-2001)
Published: 1981
Manuscript
206
207
208
209
by Avrich, Paul (1931-2006)
Published: [ca 1975]
Book
210
211
212
213
214
by Vierkandt, Alfred (1867-1953)
Published: 1981
Manuscript
215
216
by Ostwald, Wilhelm (1853-1932)
Published: 1981
Manuscript
217
218
219
220