Classification
R - Medicine
234
D - World History
114
Q - Science
73
B - Philosophy, Psychology, Religion
64
H - Social Science
52
A - General Works
33
G - Geography, Anthropology, Recreation
20
T - Technology
20
S - Agriculture
17
Z - Library Science
12
F - General American History
9
C - Historical Sciences
6
E - United States History
6
N - Fine Arts
6
J - Political Science
5
P - Language and Literature
5
L - Education
1
U - Military Science
1