Classification
D - World History
59
H - Social Science
34
G - Geography, Anthropology, Recreation
22
J - Political Science
20
Q - Science
19
P - Language and Literature
14
F - General American History
7
E - United States History
5
C - Historical Sciences
3
B - Philosophy, Psychology, Religion
2
L - Education
2
N - Fine Arts
2
A - General Works
1
Z - Library Science
1