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Inżynieria Mineralna > 2018 > R. 20, nr 2 > 7--14
Agricultural Engineering > 2015 > Vol. 19, No. 4 > 51--60
Selected Engineering Problems > 2015 > nr 6 > 51--56
Inżynieria Mineralna > 2018 > R. 20, nr 2 > 7--14
Agricultural Engineering > 2015 > Vol. 19, No. 4 > 51--60
Selected Engineering Problems > 2015 > nr 6 > 51--56