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Problemi na socialističeskoto sŭrevnovanie : Nacionalen Centŭr po Obščestvenata Proizvoditelnost na Truda kŭm Ministerstvoto na Truda i Socialnite Griži ; 1962-1972. Bibliografija....
Janakiev, Rumen (contributor); Kosev, Iskro (contributor);  … - 1972
Persistent link: https://www.econbiz.de/10014392833
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Čelen proizvodstven opit ; 2
Nikolova, Galina; Tabakova, Nedežda; Ličev, Ličo; … - 1976
Persistent link: https://www.econbiz.de/10003109312
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Sǔrevnovanieto, faktor za razvitie na proizvodstvoto
Ličev, Ličo - 1977
Persistent link: https://www.econbiz.de/10002386775
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Sistema-model za rǔkovodstvo na socialističeskoto sŭrevnovanie : kratko opisanie
Kosev, Iskro; Arabadžiev, Vasil - 1969
Persistent link: https://www.econbiz.de/10002234949
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Čelen proizvodstven opit : bibliografija
Nikolova, Galina (contributor);  … - 1975
Persistent link: https://www.econbiz.de/10003103243
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Čelen proizvodstven opit ; 1
Nikolova, Galina (contributor);  … - 1975
Persistent link: https://www.econbiz.de/10003103246