Classification
D - World History
121
R - Medicine
31
F - General American History
25
B - Philosophy, Psychology, Religion
21
A - General Works
7
H - Social Science
6
L - Education
6
U - Military Science
5
C - Historical Sciences
3
P - Language and Literature
3
Q - Science
3
Z - Library Science
3
E - United States History
1
G - Geography, Anthropology, Recreation
1
M - Music
1
T - Technology
1