索引號
D - World History
147
F - General American History
91
P - Language and Literature
58
H - Social Science
43
J - Political Science
24
K - Law
24
U - Military Science
19
E - United States History
14
B - Philosophy, Psychology, Religion
9
N - Fine Arts
8
C - Historical Sciences
3
T - Technology
3
G - Geography, Anthropology, Recreation
2
L - Education
2
R - Medicine
2
V - Naval Science
2
Q - Science
1
S - Agriculture
1