Número de Clasificación
M - Music
301
C - Historical Sciences
75
S - Agriculture
30
B - Philosophy, Psychology, Religion
24
G - Geography, Anthropology, Recreation
24
A - General Works
22
P - Language and Literature
19
R - Medicine
12
D - World History
11
F - General American History
10
E - United States History
8
V - Naval Science
8
L - Education
7
T - Technology
7
H - Social Science
5
J - Political Science
3
K - Law
2
N - Fine Arts
2
U - Military Science
2
Z - Library Science
2
Q - Science
1