Classification
D - World History
51
H - Social Science
18
P - Language and Literature
17
B - Philosophy, Psychology, Religion
16
C - Historical Sciences
12
N - Fine Arts
10
M - Music
9
J - Political Science
8
G - Geography, Anthropology, Recreation
7
Q - Science
7
K - Law
6
A - General Works
5
R - Medicine
5
E - United States History
4
L - Education
3
F - General American History
2
U - Military Science
1