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Wiśniewski, Łukasz, Wiśniewski, Łukasz and Rudnicki, R. 2016. Labour Input in Polish Agriculture Against Size of Agricultural Holdings - Spatial Analysis. Journal of Agribusiness and Rural Development. 41, 3 (Dec. 2016), 413-424. DOI:https://doi.org/10.17306/JARD.2016.69.