Klassifikationsnummer
B - Philosophy, Psychology, Religion
235
D - World History
42
F - General American History
41
P - Language and Literature
10
E - United States History
5
L - Education
5
N - Fine Arts
5
T - Technology
4
C - Historical Sciences
3
Z - Library Science
3
M - Music
2
A - General Works
1
G - Geography, Anthropology, Recreation
1
H - Social Science
1
Q - Science
1
U - Military Science
1