Classification
R - Medicine
49
Q - Science
35
B - Philosophy, Psychology, Religion
23
P - Language and Literature
13
D - World History
12
A - General Works
10
C - Historical Sciences
9
G - Geography, Anthropology, Recreation
6
M - Music
6
H - Social Science
5
F - General American History
4
N - Fine Arts
2
T - Technology
2
E - United States History
1
K - Law
1