1
by Bebel, August
published 1950
Book
2
by Niekisch, Ernst
published 1948
Book
3
4
by Freiberger, Heinrich
published 1934
Book Thesis
5
by Forchhammer, Georg
published 1930
Book
6
7
by Sombart, Werner
published 1923
Book
8
9
by Eberstadt, Rudolf
published 1910
Book
10
by Mangoldt, Karl von
published 1907
Book
11
published 1904
Still Image Exhibition Catalogue Book
12
published 1894
Book
13
published 1869
Conference Proceedings Journal
14