Klassifikationsnummer
H - Social Science
87
E - United States History
72
J - Political Science
47
K - Law
36
P - Language and Literature
27
F - General American History
25
M - Music
13
D - World History
9
U - Military Science
7
T - Technology
5
B - Philosophy, Psychology, Religion
4
C - Historical Sciences
3
G - Geography, Anthropology, Recreation
3
L - Education
2
Q - Science
2
R - Medicine
2
S - Agriculture
2
N - Fine Arts
1