Classification
P - Language and Literature
131
D - World History
75
H - Social Science
70
M - Music
50
Q - Science
40
R - Medicine
40
S - Agriculture
27
B - Philosophy, Psychology, Religion
21
K - Law
21
F - General American History
18
N - Fine Arts
16
G - Geography, Anthropology, Recreation
13
A - General Works
12
C - Historical Sciences
12
E - United States History
12
J - Political Science
11
U - Military Science
6
Z - Library Science
6
T - Technology
5
L - Education
3
V - Naval Science
1