索引号
S - Agriculture
1,012
T - Technology
688
Q - Science
159
H - Social Science
142
A - General Works
112
L - Education
33
Z - Library Science
15
G - Geography, Anthropology, Recreation
14
N - Fine Arts
13
P - Language and Literature
12
R - Medicine
12
B - Philosophy, Psychology, Religion
10
J - Political Science
8
K - Law
7
F - General American History
3
M - Music
2
C - Historical Sciences
1
D - World History
1
U - Military Science
1