Шифр
L - Education
1,391
H - Social Science
35
Q - Science
27
D - World History
15
R - Medicine
12
B - Philosophy, Psychology, Religion
9
A - General Works
6
T - Technology
5
E - United States History
4
N - Fine Arts
4
Z - Library Science
4
G - Geography, Anthropology, Recreation
3
J - Political Science
3
P - Language and Literature
3
C - Historical Sciences
2
K - Law
2
F - General American History
1
M - Music
1
U - Military Science
1