Classification
D - World History
202
R - Medicine
186
G - Geography, Anthropology, Recreation
83
C - Historical Sciences
43
B - Philosophy, Psychology, Religion
18
F - General American History
12
E - United States History
9
A - General Works
6
Z - Library Science
4
H - Social Science
2
M - Music
1
N - Fine Arts
1
P - Language and Literature
1
Q - Science
1