Número de Clasificación
B - Philosophy, Psychology, Religion
60,678
D - World History
6,684
P - Language and Literature
2,200
H - Social Science
1,182
M - Music
937
Z - Library Science
651
N - Fine Arts
587
E - United States History
467
J - Political Science
430
R - Medicine
367
K - Law
346
T - Technology
266
C - Historical Sciences
246
G - Geography, Anthropology, Recreation
246
F - General American History
239
A - General Works
229
L - Education
216
Q - Science
95
S - Agriculture
39
U - Military Science
28
V - Naval Science
6