Número de Clasificación
B - Philosophy, Psychology, Religion
51
T - Technology
48
K - Law
33
M - Music
31
A - General Works
17
C - Historical Sciences
12
P - Language and Literature
11
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
N - Fine Arts
1