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Ikonomičeski i socialni problemi na naučno-techničeskija progres : naučni trudove 82
Jordanov, Ivan (contributor) - 1983
Persistent link: https://www.econbiz.de/10000897237
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Mecʹnierul-tekʹnikuri progresis ekonomikuri epʹekʹtianoba Sakʹartʹvelos SSR mrecvelobaše
1985
Persistent link: https://www.econbiz.de/10000761088
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Naučno-techničeski progres : metodologija i analiz na efektivnostta
Popova, Violeta (revision) - 1989
Persistent link: https://www.econbiz.de/10000792705