Report of progress in the Greene and Washington district of the bituminous coal-fields of western Pennsylvania, [electronic resource] by J. J. Stevenson. Illustrated with 3 sections and 2 county maps, showing the calculated local depths of the Pittsburg, and Waynesburg coal beds beneath the surface.
Imprint
Harrisburg, Pub. by the Board of commissioners for the Second geological survey, 1876]
(In Pennsylvania. Geological survey, 2d. [Report of progress K]
At head of title: Second geological survey of Pennsylvania: 1875.
Reproduction
Electronic text and image data. Ann Arbor, Mich. : University of Michigan, Digital Library Initiatives, 2000. Includes both TIFF files and keyword searchable text. [Making of America] This volume is made possible by a grant from the Andrew W. Mellon Foundation as part of Making of America IV: the American voice, 1850-1877.