Classification
R - Medicine
52
Q - Science
26
H - Social Science
16
S - Agriculture
12
D - World History
10
A - General Works
7
K - Law
7
B - Philosophy, Psychology, Religion
6
N - Fine Arts
6
J - Political Science
5
F - General American History
4
P - Language and Literature
4
T - Technology
4
E - United States History
3
M - Music
2
C - Historical Sciences
1
G - Geography, Anthropology, Recreation
1
Z - Library Science
1