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Modeli za perspektivno razvitie na ikonomikata : [monogr
Masakov, Vi︠a︡cheslav Mikhaĭlovich (contributor);  … - 1980
Persistent link: https://www.econbiz.de/10000373351
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Metodologicheski osnovi na prognoziraneto na trudovite resursi i na kvalifikat︠s︡ii︠a︡ta na rabotnata sila : [izsledvane]
Manolov, Angel (contributor); Samuilov, S. (contributor);  … - Nauchnoizsledovatelski institut po truda (Bulgaria) - 1979
Persistent link: https://www.econbiz.de/10000668836
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Futurologija i prognostika
Gančev, Petko - 1973
Persistent link: https://www.econbiz.de/10002269694
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Socialnoto planirane : istorikomaterialističeski analiz
Gančev, Petko - 1974
Persistent link: https://www.econbiz.de/10002413937
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Kompleksnijat podchod pri prognozirane na potrebitelskoto tŭrsene
Banc̆ev, Petŭr - In: Narodnostopanski archiv 34 (1981) 1, pp. 62-70
Persistent link: https://www.econbiz.de/10001861712