Número de Clasificación
B - Philosophy, Psychology, Religion
51
T - Technology
45
K - Law
33
A - General Works
17
M - Music
16
C - Historical Sciences
11
P - Language and Literature
10
S - Agriculture
7
D - World History
6
E - United States History
3
H - Social Science
2
L - Education
2
R - Medicine
2
F - General American History
1
G - Geography, Anthropology, Recreation
1