Número de Clasificación
H - Social Science
540
J - Political Science
37
K - Law
31
F - General American History
10
D - World History
7
L - Education
3
E - United States History
2
R - Medicine
2
B - Philosophy, Psychology, Religion
1
C - Historical Sciences
1
G - Geography, Anthropology, Recreation
1
P - Language and Literature
1
Q - Science
1