Classification
P - Language and Literature
68,926
M - Music
5,063
F - General American History
3,695
K - Law
2,013
H - Social Science
1,707
A - General Works
1,674
B - Philosophy, Psychology, Religion
1,625
D - World History
1,403
R - Medicine
1,326
Q - Science
1,224
S - Agriculture
661
N - Fine Arts
541
T - Technology
464
C - Historical Sciences
432
J - Political Science
394
L - Education
358
E - United States History
217
G - Geography, Anthropology, Recreation
156
Z - Library Science
103
U - Military Science
55
V - Naval Science
15