Número de Clasificación
M - Music
48
C - Historical Sciences
14
G - Geography, Anthropology, Recreation
8
A - General Works
5
B - Philosophy, Psychology, Religion
4
P - Language and Literature
4
R - Medicine
4
D - World History
3
F - General American History
2
H - Social Science
2
L - Education
2
N - Fine Arts
1
S - Agriculture
1
T - Technology
1