Número de Clasificación
H - Social Science
26,795
D - World History
24,087
P - Language and Literature
19,107
K - Law
6,543
B - Philosophy, Psychology, Religion
4,940
J - Political Science
4,775
N - Fine Arts
4,641
L - Education
4,499
G - Geography, Anthropology, Recreation
3,016
T - Technology
1,905
M - Music
1,543
R - Medicine
1,355
Z - Library Science
1,338
C - Historical Sciences
1,243
U - Military Science
1,094
Q - Science
868
S - Agriculture
733
A - General Works
520
E - United States History
445
V - Naval Science
153
F - General American History
29