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Inovativnost na nacionalnata ikonomika
Čobanova, Rosica Dobreva - 2012
Persistent link: https://www.econbiz.de/10009763480
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Statističeski aspekti na informacionnoto obščestvo v Bălgarija
Šopova, Margarita - 2017
Persistent link: https://www.econbiz.de/10011869405