Classification
M - Music
3,346
R - Medicine
2,479
B - Philosophy, Psychology, Religion
1,882
D - World History
1,816
C - Historical Sciences
1,545
A - General Works
781
H - Social Science
715
E - United States History
706
S - Agriculture
599
F - General American History
582
Q - Science
582
T - Technology
419
J - Political Science
277
P - Language and Literature
189
Z - Library Science
132
K - Law
125
G - Geography, Anthropology, Recreation
106
L - Education
88
N - Fine Arts
69
U - Military Science
10
V - Naval Science
6