Número de Clasificación
H - Social Science
229
J - Political Science
21
G - Geography, Anthropology, Recreation
15
L - Education
11
B - Philosophy, Psychology, Religion
5
P - Language and Literature
5
Z - Library Science
5
K - Law
4
S - Agriculture
4
C - Historical Sciences
3
R - Medicine
2
F - General American History
1
N - Fine Arts
1
T - Technology
1