Шифр
N - Fine Arts
1,065
P - Language and Literature
519
L - Education
270
Z - Library Science
247
F - General American History
116
B - Philosophy, Psychology, Religion
109
H - Social Science
88
T - Technology
74
G - Geography, Anthropology, Recreation
57
J - Political Science
33
U - Military Science
33
D - World History
31
A - General Works
28
C - Historical Sciences
25
R - Medicine
24
Q - Science
19
E - United States History
18
M - Music
13
K - Law
10
S - Agriculture
6
V - Naval Science
3