索引號
F - General American History
25,718
H - Social Science
22,432
P - Language and Literature
10,775
K - Law
6,801
J - Political Science
4,308
N - Fine Arts
3,872
G - Geography, Anthropology, Recreation
2,958
M - Music
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L - Education
2,475
Q - Science
2,077
B - Philosophy, Psychology, Religion
1,810
T - Technology
1,322
R - Medicine
979
Z - Library Science
893
A - General Works
858
S - Agriculture
842
C - Historical Sciences
828
D - World History
768
U - Military Science
389
E - United States History
267
V - Naval Science
82