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1
e19/
e19/
Intangible
http://dewey.info/class/972.91064/e19/
10228919
11097702
11915736
11918461
12549862
12752064
13013075
14133975
15654481
156810063
16873741
17265002
17389942
17764981
17772857
17951347
1876788
18833847
220251859
26686587
4749372
5707118
6376352
6918917
6943713
7544647
8113436
8743585
9227491
9918923
about
e19/
Intangible
http://dewey.info/class/972.91064/e19/
type
Intangible