Klassifikationsnummer
P - Language and Literature
52
H - Social Science
47
F - General American History
40
J - Political Science
18
L - Education
13
N - Fine Arts
10
T - Technology
4
B - Philosophy, Psychology, Religion
3
M - Music
3
C - Historical Sciences
2
D - World History
2
K - Law
2
G - Geography, Anthropology, Recreation
1
Q - Science
1
Z - Library Science
1