索引號
F - General American History
58
P - Language and Literature
14
J - Political Science
13
D - World History
11
E - United States History
6
K - Law
6
H - Social Science
5
C - Historical Sciences
4
G - Geography, Anthropology, Recreation
3
A - General Works
1
B - Philosophy, Psychology, Religion
1
L - Education
1
Q - Science
1