Ταξιθετικός Αριθμός
H - Social Science
598
K - Law
244
L - Education
107
R - Medicine
71
E - United States History
64
T - Technology
46
J - Political Science
38
U - Military Science
33
S - Agriculture
26
P - Language and Literature
25
A - General Works
24
Z - Library Science
22
Q - Science
18
G - Geography, Anthropology, Recreation
14
D - World History
11
B - Philosophy, Psychology, Religion
8
M - Music
8
N - Fine Arts
6
F - General American History
4
V - Naval Science
2