Ταξιθετικός Αριθμός
P - Language and Literature
1.517
B - Philosophy, Psychology, Religion
538
H - Social Science
318
D - World History
232
J - Political Science
115
F - General American History
112
L - Education
100
N - Fine Arts
78
Q - Science
77
R - Medicine
70
K - Law
54
G - Geography, Anthropology, Recreation
50
E - United States History
29
M - Music
24
T - Technology
21
C - Historical Sciences
19
U - Military Science
9
Z - Library Science
9
S - Agriculture
7
A - General Works
1