Classification
P - Language and Literature
920
R - Medicine
74
H - Social Science
50
K - Law
35
Q - Science
31
J - Political Science
29
D - World History
18
B - Philosophy, Psychology, Religion
8
C - Historical Sciences
5
F - General American History
5
M - Music
4
A - General Works
3
S - Agriculture
3
G - Geography, Anthropology, Recreation
2
N - Fine Arts
2
T - Technology
2
U - Military Science
1
Z - Library Science
1