Stevenson, John J. (John James), 1841-1924. 24673
Report of progress in the Greene and Washington district of the bituminous coal-fields of western Pennsylvania, / by J.J. Stevenson. Illustrated with 3 sections and 2 county maps, showing the calculated local depths of the Pittsburgh and Waynesburg coal beds beneath the surface.
Harrisburg : Pub. by the Board of Commissioners for the Second Geological Survey, 1876.
At head of title: Second geological survey of Pennsylvania, 1875.
Geology -- Pennsylvania.
Coal -- Pennsylvania.