Шифр
P - Language and Literature
2,841
D - World History
2,529
H - Social Science
1,185
B - Philosophy, Psychology, Religion
1,082
N - Fine Arts
836
M - Music
770
F - General American History
598
E - United States History
404
Z - Library Science
289
J - Political Science
226
Q - Science
166
G - Geography, Anthropology, Recreation
137
C - Historical Sciences
119
R - Medicine
114
K - Law
111
A - General Works
99
L - Education
94
S - Agriculture
71
U - Military Science
49
V - Naval Science
39
T - Technology
36