Шифр
P - Language and Literature
161
H - Social Science
94
Q - Science
55
L - Education
50
T - Technology
42
B - Philosophy, Psychology, Religion
36
R - Medicine
34
D - World History
30
J - Political Science
22
G - Geography, Anthropology, Recreation
19
K - Law
17
N - Fine Arts
16
F - General American History
15
M - Music
14
C - Historical Sciences
6
S - Agriculture
5
U - Military Science
5
E - United States History
3
A - General Works
2
Z - Library Science
2