Classification
R - Medicine
108
P - Language and Literature
55
Q - Science
55
M - Music
35
B - Philosophy, Psychology, Religion
26
D - World History
21
T - Technology
12
F - General American History
8
A - General Works
7
E - United States History
6
K - Law
6
G - Geography, Anthropology, Recreation
4
C - Historical Sciences
3
H - Social Science
3
S - Agriculture
3
Z - Library Science
2