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Preparation characteristics of coal from Mercer County, W. Va.
Preparation characteristics of coal from Kanawha County, W. Va.
Preparation characteristics of coal from Russell County, Va.
Preparation characteristics of coal from Tazewell County, Va.
Preparation characteristics of coal from Hancock, Brooke, Ohio, and Marshall counties, W. Va.
Preparation characteristics of coal from Buchanan County, Va.
Anthracite in the Narragansett Basin of Rhode Island and Massachusetts