Classification
D - World History
83
F - General American History
53
H - Social Science
37
E - United States History
27
B - Philosophy, Psychology, Religion
12
A - General Works
9
Z - Library Science
9
G - Geography, Anthropology, Recreation
7
P - Language and Literature
7
Q - Science
7
C - Historical Sciences
6
N - Fine Arts
6
S - Agriculture
5
J - Political Science
4
K - Law
4
T - Technology
3
L - Education
2