Classification
R - Medicine
261
F - General American History
155
B - Philosophy, Psychology, Religion
38
S - Agriculture
35
Q - Science
33
D - World History
28
H - Social Science
27
A - General Works
26
T - Technology
26
M - Music
23
C - Historical Sciences
11
E - United States History
7
L - Education
4
K - Law
2
P - Language and Literature
2
G - Geography, Anthropology, Recreation
1
J - Political Science
1