Classification
Q - Science
488
D - World History
289
R - Medicine
183
P - Language and Literature
137
E - United States History
77
B - Philosophy, Psychology, Religion
52
C - Historical Sciences
44
F - General American History
42
A - General Works
29
M - Music
16
G - Geography, Anthropology, Recreation
4
H - Social Science
3
T - Technology
2
U - Military Science
1