Шифр
L - Education
10,008
G - Geography, Anthropology, Recreation
583
H - Social Science
551
R - Medicine
297
B - Philosophy, Psychology, Religion
219
Q - Science
215
P - Language and Literature
210
T - Technology
140
K - Law
101
D - World History
94
Z - Library Science
85
A - General Works
79
N - Fine Arts
46
J - Political Science
36
F - General American History
28
S - Agriculture
24
M - Music
23
C - Historical Sciences
16
E - United States History
9
U - Military Science
2