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Problemy Ekorozwoju > 2017 > Vol. 12, nr 1 > 131--137
Archives of Environmental Protection > 2015 > Vol. 41, no. 2 > 64--74
Proceedings of ECOpole > 2012 > Vol. 6, No. 1 > 113--119
Problemy Ekorozwoju > 2017 > Vol. 12, nr 1 > 131--137
Archives of Environmental Protection > 2015 > Vol. 41, no. 2 > 64--74
Proceedings of ECOpole > 2012 > Vol. 6, No. 1 > 113--119