索引號
H - Social Science
32
J - Political Science
18
F - General American History
8
K - Law
4
L - Education
3
P - Language and Literature
3
T - Technology
3
Q - Science
2
D - World History
1
E - United States History
1
G - Geography, Anthropology, Recreation
1
N - Fine Arts
1
R - Medicine
1
Z - Library Science
1