1
by Bebel, August
published 1950
Book
2
by Niekisch, Ernst
published 1948
Book
3
4
by Freiberger, Heinrich
published 1934
Book Thesis
5
6
by Forchhammer, Georg
published 1930
Book
7
by Sombart, Werner
published 1923
Book
8
9
published 1922
Book
10
by Eberstadt, Rudolf
published 1910
Book
11
by Mangoldt, Karl von
published 1907
Book
12
published 1904
Book Still Image Exhibition Catalogue
13
published 1894
Book
14
published 1869
Journal Conference Proceedings