Classification
D - World History
22
B - Philosophy, Psychology, Religion
17
M - Music
15
P - Language and Literature
13
F - General American History
12
Q - Science
12
C - Historical Sciences
6
H - Social Science
4
K - Law
4
N - Fine Arts
4
R - Medicine
4
A - General Works
3
E - United States History
2
G - Geography, Anthropology, Recreation
1
Z - Library Science
1