Ταξιθετικός Αριθμός
H - Social Science
688
P - Language and Literature
154
K - Law
55
R - Medicine
55
B - Philosophy, Psychology, Religion
52
L - Education
34
J - Political Science
26
G - Geography, Anthropology, Recreation
23
F - General American History
15
N - Fine Arts
15
D - World History
10
Q - Science
9
T - Technology
7
C - Historical Sciences
4
M - Music
4
U - Military Science
4
S - Agriculture
2
A - General Works
1
E - United States History
1