索引號
F - General American History
14
D - World History
12
H - Social Science
8
B - Philosophy, Psychology, Religion
4
Q - Science
4
E - United States History
3
A - General Works
2
C - Historical Sciences
2
N - Fine Arts
2
P - Language and Literature
2
Z - Library Science
2
J - Political Science
1
L - Education
1
R - Medicine
1
S - Agriculture
1
T - Technology
1
U - Military Science
1