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Efektivnost na selskostopanskoto proizvodstvo pri polivni uslovija
Petrov, E.; Lozanova, C.; Ikonomov, B. - 1980
Persistent link: https://www.econbiz.de/10003117358
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Problemi na vodnoto stopanstvo i stroitelstvo : jubileen sbornik
1981
Persistent link: https://www.econbiz.de/10003210609
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Osobenosti v ikonomičeskoto razvitie na Izrael i perspektivi na sătrudničestvoto s Bălgarija
Toševa, Svoboda - In: Ikonomičeska misăl 37 (1992) 7, pp. 90-105
Persistent link: https://www.econbiz.de/10001161299