索引號
H - Social Science
28
D - World History
9
P - Language and Literature
7
L - Education
6
Q - Science
5
K - Law
4
J - Political Science
3
N - Fine Arts
3
R - Medicine
3
B - Philosophy, Psychology, Religion
2
G - Geography, Anthropology, Recreation
1
S - Agriculture
1
T - Technology
1
Z - Library Science
1