Classification
D - World History
641
M - Music
503
P - Language and Literature
315
R - Medicine
225
F - General American History
212
G - Geography, Anthropology, Recreation
183
B - Philosophy, Psychology, Religion
143
A - General Works
74
H - Social Science
64
E - United States History
59
C - Historical Sciences
34
S - Agriculture
27
N - Fine Arts
11
T - Technology
10
J - Political Science
9
Z - Library Science
4
L - Education
3
K - Law
2
Q - Science
2