Classification
F - General American History
124
D - World History
77
R - Medicine
60
B - Philosophy, Psychology, Religion
43
H - Social Science
36
S - Agriculture
26
M - Music
25
P - Language and Literature
25
A - General Works
22
C - Historical Sciences
10
Z - Library Science
9
L - Education
6
Q - Science
6
E - United States History
5
T - Technology
5
G - Geography, Anthropology, Recreation
3
U - Military Science
2
J - Political Science
1
K - Law
1