CLASSIFICATION
R - Medicine
21,533
Q - Science
7,260
H - Social Science
5,944
P - Language and Literature
2,887
B - Philosophy, Psychology, Religion
2,336
D - World History
2,215
L - Education
1,543
J - Political Science
1,199
G - Geography, Anthropology, Recreation
1,128
T - Technology
1,054
F - General American History
965
N - Fine Arts
630
Z - Library Science
438
K - Law
323
S - Agriculture
285
E - United States History
233
C - Historical Sciences
177
M - Music
157
A - General Works
133
U - Military Science
105
V - Naval Science
2