索引号
P - Language and Literature
101
D - World History
96
K - Law
46
H - Social Science
45
B - Philosophy, Psychology, Religion
33
J - Political Science
26
N - Fine Arts
10
T - Technology
6
F - General American History
4
G - Geography, Anthropology, Recreation
4
M - Music
4
C - Historical Sciences
3
L - Education
3
R - Medicine
3
Z - Library Science
2
A - General Works
1
S - Agriculture
1