Topogràfic
H - Social Science
218
R - Medicine
26
L - Education
11
K - Law
9
P - Language and Literature
7
A - Treballs generalss
4
B - Filosofia, Psicologia, Religió
4
T - Technology
2
U - Military Science
2
E - United States History
1
G - Geography, Anthropology, Recreation
1
J - Political Science
1
Q - Science
1