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• Preparation characteristics of coal from Fayette County, Pa.
• Preparation characteristics of coal occurring in Westmoreland County, Pa.
• Preparation characteristics of coal from Pike County, Ky.
• Preparation characteristics of coal from Floyd County, Ky.
• Preparation characteristics of coal from Knott County, Ky.
• Preparation characteristics of coal from Jefferson County, Pa.
• Preparation characteristics of coal from Raleigh County, W. Va.
• Preparation characteristics of coal from McDowell County, W. Va.
• Preparation characteristics of coal from Harlan County, Ky.
• Preparation characteristics of coal from Wyoming County, W. Va.
• Preparation characteristics of coal from Lechter County, Ky.
• Preparation characteristics of coal from Mingo County, W. Va.
• Preparation characteristics of coal from Perry County, Ky.
• Preparation characteristics of coal from Lee County, Va.
• Preparation characteristics of coal from Bell County, Ky.
• Preparation characteristics of coal from Logan County, W. Va.