Klassifikationsnummer
Q - Science
584
G - Geography, Anthropology, Recreation
496
R - Medicine
143
L - Education
87
H - Social Science
49
T - Technology
40
B - Philosophy, Psychology, Religion
27
K - Law
7
S - Agriculture
7
M - Music
4
D - World History
3
N - Fine Arts
2
P - Language and Literature
2
U - Military Science
2
C - Historical Sciences
1
F - General American History
1
Z - Library Science
1