Klassifikationsnummer
H - Social Science
17
P - Language and Literature
10
G - Geography, Anthropology, Recreation
9
Q - Science
8
R - Medicine
8
L - Education
5
B - Philosophy, Psychology, Religion
4
F - General American History
4
J - Political Science
3
K - Law
3
N - Fine Arts
3
S - Agriculture
2
T - Technology
2
Z - Library Science
2
D - World History
1
E - United States History
1
M - Music
1