Classification
P - Language and Literature
713
H - Social Science
415
M - Music
207
D - World History
166
K - Law
165
Q - Science
126
F - General American History
101
B - Philosophy, Psychology, Religion
95
J - Political Science
68
N - Fine Arts
65
L - Education
62
S - Agriculture
59
A - General Works
47
R - Medicine
44
T - Technology
44
C - Historical Sciences
32
G - Geography, Anthropology, Recreation
26
Z - Library Science
14
U - Military Science
9
E - United States History
6
V - Naval Science
4