Classification
D - World History
38
F - General American History
25
P - Language and Literature
17
H - Social Science
16
E - United States History
10
J - Political Science
6
Z - Library Science
5
B - Philosophy, Psychology, Religion
3
C - Historical Sciences
2
A - General Works
1
G - Geography, Anthropology, Recreation
1
K - Law
1
S - Agriculture
1