索引號
K - Law
86
H - Social Science
85
F - General American History
37
R - Medicine
22
L - Education
16
P - Language and Literature
16
B - Philosophy, Psychology, Religion
14
G - Geography, Anthropology, Recreation
11
Q - Science
11
T - Technology
11
J - Political Science
10
N - Fine Arts
6
A - General Works
3
M - Music
3
S - Agriculture
3