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Current Contents Connect
Datenbank-Infosystem (DBIS)
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eBook Arabic Collection
EBSCO
Datenbank-Infosystem (DBIS)
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SpringerLink
Datenbank-Infosystem (DBIS)
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Open Research Library (ORL)
Datenbank-Infosystem (DBIS)
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utb elibrary
Datenbank-Infosystem (DBIS)
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OSF Preprints
Datenbank-Infosystem (DBIS)
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Wiley Online Library
Wiley
Datenbank-Infosystem (DBIS)