Classification
P - Language and Literature
31
D - World History
21
B - Philosophy, Psychology, Religion
19
H - Social Science
17
N - Fine Arts
14
M - Music
12
Q - Science
12
G - Geography, Anthropology, Recreation
7
J - Political Science
6
K - Law
4
F - General American History
2
L - Education
2
A - General Works
1
C - Historical Sciences
1
E - United States History
1
U - Military Science
1