Número de Clasificación
T - Technology
49
B - Philosophy, Psychology, Religion
33
C - Historical Sciences
18
H - Social Science
18
A - General Works
15
E - United States History
15
M - Music
8
P - Language and Literature
6
K - Law
2
G - Geography, Anthropology, Recreation
1
J - Political Science
1
N - Fine Arts
1
S - Agriculture
1
Z - Library Science
1