Topogràfic
D - World History
84
P - Language and Literature
51
H - Social Science
30
J - Political Science
21
F - General American History
13
L - Education
11
K - Law
8
B - Filosofia, Psicologia, Religió
6
M - Music
6
N - Fine Arts
5
R - Medicine
3
Z - Library Science
3
C - Historical Sciences
2
Q - Science
2
T - Technology
2
V - Naval Science
2
G - Geography, Anthropology, Recreation
1