Número de Clasificación
L - Education
761
P - Language and Literature
305
H - Social Science
215
K - Law
131
J - Political Science
97
D - World History
94
B - Philosophy, Psychology, Religion
84
R - Medicine
65
F - General American History
64
N - Fine Arts
57
Q - Science
55
G - Geography, Anthropology, Recreation
38
T - Technology
33
C - Historical Sciences
19
Z - Library Science
17
S - Agriculture
12
M - Music
4
U - Military Science
4
E - United States History
3
A - General Works
2