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Preparation characteristics of coal from Raleigh County, W. Va.
Preparation characteristics of coal from McDowell County, W. Va.
Use of pulverized rock as dense medium for salvaging coal from Pittsburgh-bed refuse
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.
Dense-medium pilot-plant performance tests on coal
Preparation characteristics of coal from Bell County, Ky.
Preparation characteristics of coal from Logan County, W. Va.
Control of fires in inactive coal deposits in western United States, including Alaska, 1948-58