Classification
D - World History
478
R - Medicine
142
G - Geography, Anthropology, Recreation
96
P - Language and Literature
45
B - Philosophy, Psychology, Religion
27
C - Historical Sciences
20
M - Music
19
F - General American History
15
E - United States History
10
N - Fine Arts
10
A - General Works
5
H - Social Science
3
Q - Science
2
S - Agriculture
1
T - Technology
1
U - Military Science
1
Z - Library Science
1