Classification
D - World History
112
E - United States History
82
B - Philosophy, Psychology, Religion
63
H - Social Science
55
C - Historical Sciences
16
F - General American History
10
J - Political Science
7
L - Education
6
Q - Science
5
P - Language and Literature
4
T - Technology
4
G - Geography, Anthropology, Recreation
3
M - Music
2
R - Medicine
1
S - Agriculture
1
Z - Library Science
1