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Problemi na ustojčivostta na agrarnija sektor u nas
Pištalov, Nikola - In: Ikonomičeski alternativi (2010) 2, pp. 115-123
Persistent link: https://www.econbiz.de/10003979316
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Ot opazvane na okolnata sreda kăm ustojčivo razvitie
Kovačev, Asen - In: Statistika / Nacionalen Statističeski Institut 50 (1998) 1, pp. 3-20
Persistent link: https://www.econbiz.de/10001249457