1
Published 1845
Book
2
Published 1884
Book
3
Published 1884
Book
4
Published 1892
Zettel
Book
5
Published 1902
Book
6
Published 1904
Book
7
Published 1904
Book
8
Published 1905
Book
9
Published 1906
Book
10
Published 1906
Book
11
Published 1908
Book
12
Published 1909
Book
13
Published 1910
Book
14
Published 1917
Book
15
Published 1919
Book
16
Published 1919
Book
17
Published 1919
Book
18
Published 1920
Book
19
Published 1920
Book
20
Published 1920
Book