Número de Clasificación
C - Historical Sciences
80
M - Music
25
B - Philosophy, Psychology, Religion
9
S - Agriculture
9
F - General American History
8
D - World History
5
A - General Works
4
P - Language and Literature
4
G - Geography, Anthropology, Recreation
3
R - Medicine
3
T - Technology
2
V - Naval Science
2
E - United States History
1
H - Social Science
1
K - Law
1
N - Fine Arts
1