1
2
Author: Helweg, Halvdan, 1884-
Published 1914
Record Source: Published Materials
Book
3
4
Published 1985
Record Source: Published Materials
Journal
5
6
Published 1980
Record Source: Published Materials
Book
7
8
10
11
Published 1985
Record Source: Published Materials
Journal
13
15
Published 1986
Record Source: Published Materials
Book
16
Published 1986
Record Source: Published Materials
Journal
18
Published 1960
Record Source: Published Materials
Book
19