Topogràfic
P - Language and Literature
764
H - Social Science
49
F - General American History
42
D - World History
35
N - Fine Arts
24
B - Filosofia, Psicologia, Religió
17
J - Political Science
11
L - Education
11
M - Music
3
Q - Science
3
G - Geography, Anthropology, Recreation
2
Z - Library Science
2
E - United States History
1
R - Medicine
1
S - Agriculture
1
U - Military Science
1