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Ikonomičeski problemi na izvǎnproizvodstvenata sfera
Samardžieva, Violeta - 1979
Persistent link: https://www.econbiz.de/10001354626
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Vsestranna intenzifikacija na proizvodstvoto
Dočev, Ivan - 1983
Persistent link: https://www.econbiz.de/10002076816
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Intenzifikacija i efektivnost
Jordanov, Todor - 1982
Persistent link: https://www.econbiz.de/10002035350
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Intenzifikacija na narodnoto stopanstvo : Referativen sbornik
1984
Persistent link: https://www.econbiz.de/10003152740
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Energetika i intenzifikacija
Todoriev, Nikola - 1984
Persistent link: https://www.econbiz.de/10002936556