2
Published 1873
Book
3
Published 1874
Volltext
eBook
6
Published 1895
Zettel
Book
7
Published 1896
Book
8
Published 1896
Book
9
Published 1903
Book
10
Published 1911
Book
12
Published 1922
Book
13
Published 1924
Book
15
16
Published 1950
Book