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Journal of Sustainable Mining > 2020 > Vol. 19, iss. 4 > 254--271
Inżynieria Mineralna > 2020 > no. 2, vol. 2 > 189--192
Journal of Sustainable Mining > 2020 > Vol. 19, iss. 4 > 254--271
Inżynieria Mineralna > 2020 > no. 2, vol. 2 > 189--192