索引号
H - Social Science
548
K - Law
233
L - Education
99
R - Medicine
65
E - United States History
52
T - Technology
42
U - Military Science
32
J - Political Science
30
S - Agriculture
25
P - Language and Literature
23
A - General Works
19
Z - Library Science
18
Q - Science
17
G - Geography, Anthropology, Recreation
13
D - World History
9
B - Philosophy, Psychology, Religion
8
M - Music
7
N - Fine Arts
5
F - General American History
4
V - Naval Science
2