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BMC Health Services Research > 2019 > 19 > 1 > 1-7
Zagadnienia Ekonomiki Rolnej > 2015 > 344(3) > 101-111
Zagadnienia Ekonomiki Rolnej > 2015 > 3(344) > 101-111
Journal of Agribusiness and Rural Development > 2015 > 4(38) > 705-715
Bulletin of Geography. Socio-economic series > 2012 > 17 > 5-12
Bulletin of Geography. Socio-economic Series > 2012 > 17 > 17 > 5-12