Número de Clasificación
N - Fine Arts
431
D - World History
78
B - Philosophy, Psychology, Religion
59
P - Language and Literature
17
C - Historical Sciences
5
G - Geography, Anthropology, Recreation
4
H - Social Science
4
A - General Works
3
K - Law
3
L - Education
3
T - Technology
3
E - United States History
1
F - General American History
1
M - Music
1