索引號
H - Social Science
6,322
D - World History
5,347
P - Language and Literature
3,271
M - Music
2,038
G - Geography, Anthropology, Recreation
2,002
F - General American History
1,884
E - United States History
1,381
N - Fine Arts
1,365
B - Philosophy, Psychology, Religion
1,087
T - Technology
992
R - Medicine
871
J - Political Science
693
Q - Science
584
L - Education
510
K - Law
414
S - Agriculture
348
U - Military Science
167
Z - Library Science
156
C - Historical Sciences
122
V - Naval Science
68
A - General Works
27