19 books
The Geology of Erie and Crawford Counties (Classic Reprint)
The Geology of Erie and Crawford Counties (Large Text Classic Reprint)
The Permian or Upper Carboniferous Flora
The Geology of Susquehanna County and Wayne County - Scholar's Choice Edition
The Geology of Erie and Crawford Counties Discovery of the Preglacial outlet of lake erie
Petroleum and Natural Gas, Precise Levels Volume 14
Stratigraphy of the Bituminous Coal Field of Pennsylvania, Ohio and West Virginia
The Geology of the Susquehanna River Region in the Six Counties of Wyoming, Lackawanna, Luzerne, Columbia, Montour, and Northumberland Volume 25
Petroleum and Natural Gas, Precise Levels Volume 1, PT. 1
The Geology of Pike and Monroe Counties
The Geology of Susquehanna County and Wayne County Volume 23
Levels Above Tide, True Meridians, Report on Coal Volume 2
Report of Progress in the Beaver River District of the Bituminous Coal-Fields of Western Pennsylvania Volume 51
Stratigraphy of the Bitmuninous Coal Field of Pennsylvania, Ohio and West Virginia Volume 62-65
The Geology of Huntingdon County Volume 3
The Geology of Lawrence County; To Which Is Appended a Special Report on the Correlation of the Coal Measures of Western Pennsylvania and Eastern Ohio
The Geology of Erie and Crawford Counties Volume 54
The Geology of Lawrence County
The Geology of Susquehanna County and Wayne County