Classification
P - Language and Literature
72
Q - Science
57
H - Social Science
20
G - Geography, Anthropology, Recreation
15
B - Philosophy, Psychology, Religion
14
D - World History
13
T - Technology
10
S - Agriculture
8
K - Law
4
L - Education
4
R - Medicine
4
J - Political Science
3
A - General Works
2
F - General American History
1
M - Music
1
U - Military Science
1