Número de Clasificación
B - Philosophy, Psychology, Religion
39
T - Technology
18
A - General Works
17
C - Historical Sciences
16
K - Law
7
M - Music
6
S - Agriculture
4
D - World History
3
F - General American History
3
N - Fine Arts
2
E - United States History
1
G - Geography, Anthropology, Recreation
1
H - Social Science
1