Classification
P - Language and Literature
285
Q - Science
118
H - Social Science
63
S - Agriculture
58
T - Technology
57
D - World History
26
G - Geography, Anthropology, Recreation
24
B - Philosophy, Psychology, Religion
19
M - Music
16
L - Education
12
R - Medicine
12
K - Law
11
C - Historical Sciences
9
N - Fine Arts
8
F - General American History
4
U - Military Science
4
Z - Library Science
4
A - General Works
3
J - Political Science
3
E - United States History
2
V - Naval Science
1