Classification
D - World History
35
M - Music
18
H - Social Science
14
Q - Science
12
B - Philosophy, Psychology, Religion
9
R - Medicine
9
J - Political Science
6
L - Education
5
A - General Works
4
F - General American History
2
G - Geography, Anthropology, Recreation
2
P - Language and Literature
2
S - Agriculture
2
T - Technology
2
E - United States History
1
N - Fine Arts
1
Z - Library Science
1