Número de Clasificación
H - Social Science
58,545
K - Law
17,875
L - Education
7,699
C - Historical Sciences
4,253
R - Medicine
2,200
D - World History
1,801
J - Political Science
1,800
G - Geography, Anthropology, Recreation
1,648
F - General American History
1,377
T - Technology
1,338
N - Fine Arts
1,303
E - United States History
1,059
Z - Library Science
981
B - Philosophy, Psychology, Religion
949
P - Language and Literature
888
M - Music
878
Q - Science
772
A - General Works
702
S - Agriculture
617
U - Military Science
487
V - Naval Science
68