索引号
H - Social Science
102
P - Language and Literature
82
Q - Science
49
B - Philosophy, Psychology, Religion
42
L - Education
39
K - Law
36
F - General American History
34
T - Technology
33
D - World History
28
R - Medicine
26
S - Agriculture
24
G - Geography, Anthropology, Recreation
21
J - Political Science
18
A - General Works
17
N - Fine Arts
16
Z - Library Science
6
C - Historical Sciences
5
E - United States History
4
U - Military Science
3
M - Music
2