Author: Publisher:
ISBN:
Category : Coal
Languages : en
Pages : 238
Book Description
Coal Resources of Butler County, Pennsylvania: Coal crop lines, mined-out areas, and structure contours PDF Download
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Author: Publisher:
ISBN:
Category : Coal
Languages : en
Pages : 238
Book Description
Author: 
Author: Geological Survey of Pennsylvania
Author: 
Author: 
Author: Pennsylvania. Bureau of Topographic and Geologic Survey
Author: 
Author: Elmer Davisson Patterson
Author: 
Author: 
Author: 