1
Published 1876
Electronic
2
Published 1893
Electronic
3
Published 1894
Book
4
Published 1926
Journal
5
Published 1926
Journal
6
Published 1928
Electronic
7
Published 1932
Book
8
Published 1933
Book
9
Published 1935
Book
10
Published 1936
Electronic
11
Published 1939
Journal
12
Published 1939
Journal
13
Published 1939
Journal
14
Published 1945
Book
15
Published 1946
Serial
16
Journal
17
Journal
18
Journal
19
Electronic
20
Journal