Topogràfic
H - Social Science
239
R - Medicine
62
B - Filosofia, Psicologia, Religió
34
K - Law
29
L - Education
14
P - Language and Literature
10
S - Agriculture
9
Q - Science
6
G - Geography, Anthropology, Recreation
3
J - Political Science
3
F - General American History
2
E - United States History
1
N - Fine Arts
1