1
2
3
4
5
6
7
8
9
10
11
12
13
Published 1925
“...Bibliographie zur neuen österreichischen Biographie...”
Serial
14
Published 1928
Serial
15
16
Published 1931
“...Bibliography of North American geology / Mehrjahresausgabe...”
Serial
17
Published 1931
“...<<The>> year's work in bibliography...”
Serial
18
19
20
Published 1934
“...International educational bibliography...”
Serial