索引號
H - Social Science
206
L - Education
83
P - Language and Literature
83
J - Political Science
58
G - Geography, Anthropology, Recreation
38
B - Philosophy, Psychology, Religion
31
Q - Science
22
M - Music
20
F - General American History
19
T - Technology
19
K - Law
15
D - World History
14
R - Medicine
13
N - Fine Arts
9
E - United States History
5
C - Historical Sciences
4
Z - Library Science
4
A - General Works
2
U - Military Science
2
S - Agriculture
1