索引號
H - Social Science
787
S - Agriculture
442
Q - Science
284
L - Education
198
B - Philosophy, Psychology, Religion
190
R - Medicine
187
A - General Works
161
J - Political Science
96
T - Technology
55
K - Law
49
P - Language and Literature
48
Z - Library Science
32
F - General American History
17
G - Geography, Anthropology, Recreation
15
N - Fine Arts
14
U - Military Science
3