索引号
L - Education
529
Q - Science
493
H - Social Science
348
R - Medicine
186
S - Agriculture
157
P - Language and Literature
56
T - Technology
53
B - Philosophy, Psychology, Religion
43
G - Geography, Anthropology, Recreation
37
J - Political Science
34
A - General Works
22
K - Law
22
Z - Library Science
15
N - Fine Arts
14
D - World History
8
C - Historical Sciences
6
F - General American History
3