1
Published 1881
Book
2
Published 1882
Book
3
Published 1883
Book
4
Published 1886
Zettel
Book
5
Published 1887
Zettel
Book
6
7
Published 1894
Book
8
Published 1894
Zettel
Book
10
Published 1899
Book
11
Published 1899
Book
12
Published 1900
Book
13
Published 1900
Book
14
Published 1900
Book
15
Published 1902
Book
16
Published 1902
Book
17
Published 1902
Book
18
Published 1904
Book
19
Published 1908
Book
20
Published 1908
Book