Free Preview of 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 Pittsburg, and Waynesburg Coal Be
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 Pittsburg, and Waynesburg Coal Be