Classification
R - Medicine
234
D - World History
111
Q - Science
72
B - Philosophy, Psychology, Religion
64
H - Social Science
52
A - General Works
33
T - Technology
20
G - Geography, Anthropology, Recreation
18
S - Agriculture
16
Z - Library Science
11
F - General American History
7
C - Historical Sciences
6
E - United States History
6
N - Fine Arts
6
J - Political Science
5
P - Language and Literature
4
L - Education
1
U - Military Science
1