Número de Clasificación
L - Education
602
H - Social Science
36
Q - Science
36
T - Technology
16
P - Language and Literature
15
K - Law
10
G - Geography, Anthropology, Recreation
9
N - Fine Arts
9
R - Medicine
9
D - World History
5
B - Philosophy, Psychology, Religion
4
Z - Library Science
4
F - General American History
3
S - Agriculture
3
A - General Works
2
C - Historical Sciences
1
J - Political Science
1