1
2
3
4
5
Author: Helweg, Halvdan, 1884-
Published 1914
Record Source: Published Materials
Book
6
8
Author: Browder, Earl, 1891-1973.
Published 1939
Record Source: Published Materials
Book
9
Published 1948
Record Source: Published Materials
Book
11
Published 1985
Record Source: Published Materials
Journal
13
14
Published 1980
Record Source: Published Materials
Book
15
16
18
19
Published 1985
Record Source: Published Materials
Journal