Número de Clasificación
F - General American History
317
N - Fine Arts
294
T - Technology
70
E - United States History
8
G - Geography, Anthropology, Recreation
7
H - Social Science
5
P - Language and Literature
5
Q - Science
3
D - World History
2
Z - Library Science
2
A - General Works
1
C - Historical Sciences
1
M - Music
1