索引号
S - Agriculture
751
H - Social Science
531
L - Education
495
T - Technology
468
Q - Science
387
R - Medicine
252
B - Philosophy, Psychology, Religion
201
P - Language and Literature
149
J - Political Science
102
K - Law
77
A - General Works
56
N - Fine Arts
50
G - Geography, Anthropology, Recreation
22
Z - Library Science
15
C - Historical Sciences
9
F - General American History
8
D - World History
5
E - United States History
3
M - Music
1