Número de Clasificación
P - Language and Literature
40
H - Social Science
17
D - World History
15
T - Technology
14
B - Philosophy, Psychology, Religion
13
F - General American History
13
K - Law
10
N - Fine Arts
9
G - Geography, Anthropology, Recreation
7
J - Political Science
5
Q - Science
5
L - Education
4
R - Medicine
4
E - United States History
3
C - Historical Sciences
2
S - Agriculture
2
Z - Library Science
2
A - General Works
1