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2
Electronic
Archived Material
Archivdatenbank (Archivportal-D)
Archivdatenbank (Kalliope Verbundkatalog)
3
Electronic
Archived Material
Archivdatenbank (Archivportal-D)
Archivdatenbank (Kalliope Verbundkatalog)
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5
6
7
8
9
10
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12
Electronic
Article
Presumably Free Access
Volltext (Resolving-System)
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15
Electronic
Article
Presumably Free Access
Volltext (Verlag)
Volltext (doi)
History 1850-2016
16
Electronic
Article
Presumably Free Access
Volltext (Verlag)
Volltext (doi)
17
Electronic
Article
Volltext (Resolving-System)
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