Ταξιθετικός Αριθμός
H - Social Science
70
L - Education
18
R - Medicine
18
J - Political Science
13
K - Law
10
B - Philosophy, Psychology, Religion
6
G - Geography, Anthropology, Recreation
3
S - Agriculture
3
T - Technology
3
D - World History
2
P - Language and Literature
2
Q - Science
2
C - Historical Sciences
1
F - General American History
1