Classification
D - World History
269
B - Philosophy, Psychology, Religion
170
R - Medicine
112
M - Music
64
P - Language and Literature
62
F - General American History
58
A - General Works
55
C - Historical Sciences
29
E - United States History
20
H - Social Science
16
S - Agriculture
12
J - Political Science
11
K - Law
10
Z - Library Science
10
Q - Science
2
U - Military Science
2
G - Geography, Anthropology, Recreation
1
L - Education
1