Número de Clasificación
P - Language and Literature
633
D - World History
376
B - Philosophy, Psychology, Religion
209
N - Fine Arts
171
M - Music
112
C - Historical Sciences
55
K - Law
42
H - Social Science
25
Z - Library Science
25
G - Geography, Anthropology, Recreation
16
J - Political Science
16
A - General Works
15
Q - Science
13
R - Medicine
9
L - Education
6
T - Technology
3
E - United States History
2
S - Agriculture
1
U - Military Science
1