索引号
H - Social Science
212
R - Medicine
83
L - Education
73
T - Technology
62
K - Law
57
J - Political Science
47
P - Language and Literature
40
Q - Science
31
B - Philosophy, Psychology, Religion
17
F - General American History
16
G - Geography, Anthropology, Recreation
13
D - World History
8
E - United States History
6
N - Fine Arts
6
C - Historical Sciences
4
Z - Library Science
4
A - General Works
3
S - Agriculture
3
U - Military Science
2