Шифр
H - Social Science
131
L - Education
102
K - Law
56
E - United States History
24
Z - Library Science
16
J - Political Science
14
P - Language and Literature
13
R - Medicine
12
A - General Works
7
Q - Science
6
T - Technology
6
B - Philosophy, Psychology, Religion
4
D - World History
4
M - Music
4
U - Military Science
4
G - Geography, Anthropology, Recreation
3
N - Fine Arts
3
S - Agriculture
3
C - Historical Sciences
2
F - General American History
2