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Agricultural Engineering > 2015 > Vol. 19, No. 3 > 109--117
Wiertnictwo, Nafta, Gaz > 2008 > T. 25, z. 2 > 311-316
Agricultural Engineering > 2015 > Vol. 19, No. 3 > 109--117
Wiertnictwo, Nafta, Gaz > 2008 > T. 25, z. 2 > 311-316