Classification
R - Medicine
4 857
D - World History
1 710
B - Philosophy, Psychology, Religion
1 266
Q - Science
1 094
H - Social Science
820
A - General Works
449
G - Geography, Anthropology, Recreation
289
T - Technology
285
F - General American History
269
E - United States History
221
S - Agriculture
216
P - Language and Literature
145
Z - Library Science
141
C - Historical Sciences
121
K - Law
85
N - Fine Arts
76
J - Political Science
75
L - Education
63
M - Music
39
U - Military Science
14
V - Naval Science
14