Número de Clasificación
D - World History
12,452
H - Social Science
12,383
J - Political Science
5,178
P - Language and Literature
860
K - Law
722
U - Military Science
202
C - Historical Sciences
154
B - Philosophy, Psychology, Religion
146
G - Geography, Anthropology, Recreation
91
E - United States History
80
F - General American History
80
Z - Library Science
75
M - Music
73
N - Fine Arts
73
L - Education
58
T - Technology
58
R - Medicine
29
A - General Works
26
Q - Science
26
S - Agriculture
17
V - Naval Science
2