Número de Clasificación
L - Education
500
P - Language and Literature
27
H - Social Science
26
K - Law
18
G - Geography, Anthropology, Recreation
15
D - World History
12
Q - Science
10
B - Philosophy, Psychology, Religion
9
R - Medicine
5
T - Technology
5
A - General Works
3
Z - Library Science
3
M - Music
2
F - General American History
1
J - Political Science
1
N - Fine Arts
1
U - Military Science
1