Topogràfic
B - Filosofia, Psicologia, Religió
1,141
F - General American History
92
H - Social Science
37
K - Law
37
P - Language and Literature
36
G - Geography, Anthropology, Recreation
17
J - Political Science
14
N - Fine Arts
12
C - Historical Sciences
8
D - World History
8
R - Medicine
5
E - United States History
2
L - Education
2
M - Music
1
Q - Science
1
T - Technology
1
Z - Library Science
1