索引号
N - Fine Arts
131,805
D - World History
16,977
T - Technology
13,703
P - Language and Literature
4,587
Z - Library Science
4,508
G - Geography, Anthropology, Recreation
3,730
F - General American History
2,651
H - Social Science
2,580
B - Philosophy, Psychology, Religion
2,033
M - Music
1,899
E - United States History
1,734
C - Historical Sciences
1,063
Q - Science
858
A - General Works
706
S - Agriculture
704
J - Political Science
546
R - Medicine
438
L - Education
430
U - Military Science
307
K - Law
161
V - Naval Science
112