Classification
M - Music
9,150
D - World History
9,048
F - General American History
8,091
P - Language and Literature
5,865
B - Philosophy, Psychology, Religion
3,624
R - Medicine
2,826
E - United States History
2,152
H - Social Science
2,072
A - General Works
1,638
Z - Library Science
1,102
C - Historical Sciences
1,008
J - Political Science
766
K - Law
582
T - Technology
526
L - Education
422
N - Fine Arts
414
Q - Science
394
S - Agriculture
250
G - Geography, Anthropology, Recreation
220
U - Military Science
160
V - Naval Science
51