Classification
R - Medicine
43
H - Social Science
16
B - Philosophy, Psychology, Religion
14
C - Historical Sciences
10
P - Language and Literature
8
Q - Science
6
A - General Works
5
D - World History
5
M - Music
4
T - Technology
4
S - Agriculture
2
F - General American History
1
G - Geography, Anthropology, Recreation
1
J - Political Science
1
Z - Library Science
1