Classification
P - Language and Literature
63
H - Social Science
41
M - Music
35
T - Technology
30
R - Medicine
27
V - Naval Science
18
C - Historical Sciences
14
F - General American History
13
B - Philosophy, Psychology, Religion
12
D - World History
9
Q - Science
9
A - General Works
7
J - Political Science
5
K - Law
5
Z - Library Science
4
G - Geography, Anthropology, Recreation
3
E - United States History
2