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Journal of Agribusiness and Rural Development > 2008 > 3[9] > 63-76
Journal of Agribusiness and Rural Development > 2008 > 1[7] > 61-71
Acta Scientiarum Polonorum. Agricultura > 2004 > 3 > 1 > 5-18
Roczniki Akademii Rolniczej w Poznaniu. Ekonomia > 2002 > 1 > 53-70