Classification
P - Language and Literature
13,362
D - World History
1,768
M - Music
1,717
Q - Science
1,501
H - Social Science
1,338
C - Historical Sciences
1,145
B - Philosophy, Psychology, Religion
1,092
S - Agriculture
776
E - United States History
638
F - General American History
559
T - Technology
494
A - General Works
382
R - Medicine
369
L - Education
354
G - Geography, Anthropology, Recreation
268
J - Political Science
240
N - Fine Arts
218
Z - Library Science
187
K - Law
182
U - Military Science
44
V - Naval Science
4