Classification
P - Language and Literature
3,784
D - World History
27
M - Music
11
H - Social Science
10
B - Philosophy, Psychology, Religion
9
F - General American History
6
A - General Works
5
N - Fine Arts
5
J - Political Science
4
Q - Science
3
R - Medicine
3
T - Technology
3
C - Historical Sciences
2
G - Geography, Anthropology, Recreation
2
Z - Library Science
2
L - Education
1
S - Agriculture
1