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Patentna aktivnost i naučnoizsledovatelska i razvojna dejnost v Bălgarija
Georgieva, Rumjana - In: Ikonomičeska misăl 54 (2009) 5, pp. 26-53
Persistent link: https://www.econbiz.de/10003934694
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Visšeto obrazovanie i naukata v Bălgarija : ikonomičeski, socialni i džendăr izmerenija
Zareva, Irena; Matev, Matju Vălčev; Kirova, Alla - 2014
Persistent link: https://www.econbiz.de/10010437825