Klassifikationsnummer
G - Geography, Anthropology, Recreation
232
H - Social Science
220
B - Philosophy, Psychology, Religion
115
F - General American History
74
L - Education
19
R - Medicine
9
J - Political Science
6
P - Language and Literature
6
C - Historical Sciences
5
N - Fine Arts
5
Q - Science
4
D - World History
3
K - Law
2
M - Music
2
T - Technology
2
A - General Works
1
S - Agriculture
1
Z - Library Science
1