Classification
P - Language and Literature
1 478
M - Music
60
D - World History
50
Q - Science
28
B - Philosophy, Psychology, Religion
27
H - Social Science
24
F - General American History
12
J - Political Science
9
K - Law
9
A - General Works
7
R - Medicine
7
N - Fine Arts
6
S - Agriculture
2
U - Military Science
2
T - Technology
1
Z - Library Science
1