Número de Clasificación
B - Philosophy, Psychology, Religion
183
D - World History
35
E - United States History
6
M - Music
5
Z - Library Science
3
F - General American History
2
L - Education
2
C - Historical Sciences
1
G - Geography, Anthropology, Recreation
1
H - Social Science
1
K - Law
1
P - Language and Literature
1
R - Medicine
1