1
Published 1871
Electronic
2
Published 1874
Journal
3
Published 1875
Electronic
4
Published 1878
Electronic
5
Published 1882
Electronic
6
Published 1882
Electronic
7
Published 1882
Electronic
8
Published 1884
Electronic
9
Published 1892
Electronic
10
Published 1894
Electronic
11
Published 1894
Electronic
12
Published 1899
Electronic
13
Published 1905
Journal
14
15
Published 1908
Journal
16
Published 1926
Electronic
17
Published 1926
Journal
18
Journal
19
Electronic
20
Electronic