Шифр
P - Language and Literature
947
S - Agriculture
653
Q - Science
104
H - Social Science
82
T - Technology
27
C - Historical Sciences
25
F - General American History
25
R - Medicine
23
G - Geography, Anthropology, Recreation
22
K - Law
17
L - Education
10
M - Music
10
Z - Library Science
10
J - Political Science
9
D - World History
7
E - United States History
6
A - General Works
5
N - Fine Arts
3
B - Philosophy, Psychology, Religion
2
V - Naval Science
2