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Washability studies of the America and Pratt coal beds at Gorgas, Ala.

A washability study of the Woodstock coal bed at Klondyke mine, West Blocton, Ala.

Some small coal jigs for mechanical cleaning of coal at truck mines and other low-tonnage operations

Washability studies of the Clark and Gholson coal beds at Boothton, Ala.

Washability study of the Pratt bed at the Davidson mine, Graysville, Ala.


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