Klassifikationsnummer
P - Language and Literature
7,460
D - World History
243
H - Social Science
127
E - United States History
32
G - Geography, Anthropology, Recreation
29
B - Philosophy, Psychology, Religion
24
F - General American History
22
N - Fine Arts
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L - Education
16
R - Medicine
15
T - Technology
15
K - Law
9
J - Political Science
8
S - Agriculture
8
Q - Science
7
U - Military Science
5
C - Historical Sciences
3
V - Naval Science
2