Classification
D - World History
32
H - Social Science
29
P - Language and Literature
25
B - Philosophy, Psychology, Religion
21
Q - Science
15
M - Music
14
G - Geography, Anthropology, Recreation
10
N - Fine Arts
8
J - Political Science
5
A - General Works
4
C - Historical Sciences
4
F - General American History
4
L - Education
3
E - United States History
2
K - Law
1
R - Medicine
1
T - Technology
1