Abstract
Properties and structure of hard coals from the borehole Niedobczyce IG-1 in Rybnik coal district, Upper Silesian Coal Basin, their petrographic and group constituents. 1. Variations in properties of the coals along the depth of the borehole : S. Jasienko, A. Matuszewska & A. John, Fuel Processing Technology, 41(3), 1995, pp 207–220
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