索引号
Q - Science
71
H - Social Science
70
L - Education
59
B - Philosophy, Psychology, Religion
23
P - Language and Literature
15
D - World History
11
K - Law
11
R - Medicine
11
G - Geography, Anthropology, Recreation
8
T - Technology
8
J - Political Science
4
N - Fine Arts
4
C - Historical Sciences
3
Z - Library Science
3
A - General Works
1