Ταξιθετικός Αριθμός
B - Philosophy, Psychology, Religion
1.643
H - Social Science
878
R - Medicine
482
L - Education
256
K - Law
93
G - Geography, Anthropology, Recreation
63
P - Language and Literature
34
J - Political Science
22
Q - Science
14
N - Fine Arts
10
T - Technology
6
A - General Works
4
C - Historical Sciences
4
D - World History
4
S - Agriculture
4
F - General American History
3
E - United States History
1
M - Music
1
U - Military Science
1