Classification
D - World History
26
M - Music
17
F - General American History
12
E - United States History
11
H - Social Science
8
B - Philosophy, Psychology, Religion
7
A - General Works
5
P - Language and Literature
4
R - Medicine
3
G - Geography, Anthropology, Recreation
1
J - Political Science
1
S - Agriculture
1
Z - Library Science
1