Número de Clasificación
P - Language and Literature
4,270
D - World History
3,778
N - Fine Arts
3,502
B - Philosophy, Psychology, Religion
2,206
H - Social Science
1,987
M - Music
1,327
L - Education
496
J - Political Science
423
R - Medicine
348
Z - Library Science
345
K - Law
337
Q - Science
291
G - Geography, Anthropology, Recreation
268
T - Technology
242
U - Military Science
213
F - General American History
189
C - Historical Sciences
172
A - General Works
135
S - Agriculture
116
E - United States History
109
V - Naval Science
79