索引號
H - Social Science
681
F - General American History
391
P - Language and Literature
225
K - Law
153
S - Agriculture
112
J - Political Science
109
L - Education
99
N - Fine Arts
54
Q - Science
48
G - Geography, Anthropology, Recreation
36
B - Philosophy, Psychology, Religion
28
T - Technology
25
R - Medicine
23
D - World History
16
M - Music
11
E - United States History
8
Z - Library Science
6
C - Historical Sciences
5
U - Military Science
5
A - General Works
1