索引號
D - World History
20,135
P - Language and Literature
6,837
B - Philosophy, Psychology, Religion
4,532
H - Social Science
3,248
N - Fine Arts
2,590
G - Geography, Anthropology, Recreation
2,481
C - Historical Sciences
1,444
Z - Library Science
1,391
M - Music
1,281
J - Political Science
804
L - Education
757
K - Law
546
Q - Science
515
T - Technology
464
A - General Works
461
R - Medicine
434
S - Agriculture
285
U - Military Science
261
E - United States History
141
V - Naval Science
87
F - General American History
30