索引號
F - General American History
82
H - Social Science
70
P - Language and Literature
65
N - Fine Arts
21
L - Education
17
J - Political Science
16
T - Technology
11
G - Geography, Anthropology, Recreation
9
K - Law
9
E - United States History
6
B - Philosophy, Psychology, Religion
5
D - World History
5
Q - Science
4
R - Medicine
4
M - Music
3
S - Agriculture
3
Z - Library Science
2