索引号
E - United States History
76
H - Social Science
60
P - Language and Literature
56
F - General American History
22
D - World History
16
J - Political Science
14
M - Music
7
K - Law
6
A - General Works
5
L - Education
5
U - Military Science
4
Q - Science
3
T - Technology
3
B - Philosophy, Psychology, Religion
2
N - Fine Arts
2
Z - Library Science
2
C - Historical Sciences
1
G - Geography, Anthropology, Recreation
1
S - Agriculture
1
V - Naval Science
1