Número de Clasificación
A - General Works
344
T - Technology
311
B - Philosophy, Psychology, Religion
190
E - United States History
79
C - Historical Sciences
75
M - Music
18
S - Agriculture
7
D - World History
6
U - Military Science
6
Z - Library Science
5
F - General American History
2
K - Law
2
L - Education
1
P - Language and Literature
1