Topogràfic
P - Language and Literature
115
H - Social Science
47
F - General American History
46
N - Fine Arts
26
D - World History
25
B - Filosofia, Psicologia, Religió
21
L - Education
18
J - Political Science
13
M - Music
6
T - Technology
6
C - Historical Sciences
5
K - Law
3
R - Medicine
2
E - United States History
1
Q - Science
1
Z - Library Science
1