Classification
Q - Science
146
R - Medicine
91
B - Philosophy, Psychology, Religion
32
D - World History
20
P - Language and Literature
14
E - United States History
13
A - General Works
10
C - Historical Sciences
6
G - Geography, Anthropology, Recreation
3
F - General American History
2
M - Music
1
T - Technology
1
Z - Library Science
1