Classification
P - Language and Literature
94
Q - Science
56
H - Social Science
47
D - World History
44
T - Technology
37
C - Historical Sciences
30
B - Philosophy, Psychology, Religion
25
M - Music
24
S - Agriculture
23
J - Political Science
19
E - United States History
14
R - Medicine
14
A - General Works
13
K - Law
12
Z - Library Science
11
G - Geography, Anthropology, Recreation
8
F - General American History
7
N - Fine Arts
6
L - Education
5
U - Military Science
3
V - Naval Science
2