索引號
D - World History
30
P - Language and Literature
26
H - Social Science
14
Z - Library Science
13
B - Philosophy, Psychology, Religion
10
G - Geography, Anthropology, Recreation
7
J - Political Science
7
E - United States History
6
L - Education
5
F - General American History
3
K - Law
3
C - Historical Sciences
2
M - Music
2
N - Fine Arts
1
T - Technology
1
U - Military Science
1