Número de Clasificación
H - Social Science
90
P - Language and Literature
38
R - Medicine
35
G - Geography, Anthropology, Recreation
22
L - Education
20
Q - Science
18
F - General American History
17
B - Philosophy, Psychology, Religion
16
D - World History
14
J - Political Science
12
K - Law
11
S - Agriculture
9
T - Technology
7
N - Fine Arts
6
Z - Library Science
5
A - General Works
4
M - Music
3
C - Historical Sciences
1
E - United States History
1