Robert G. Piotrowski

• Black shale and sandstone facies of the Devonian "Catskill" clastic wedge in the subsurface of western Pennsylvania
• Geology and natural gas production of the Lower Silurian Medina group and equivalent rock units in Pennsylvania
• Oil & Gas Developments in Pennsylvania in 1978 (Progress Report (Pennsylvania. Bureau of Topographic and Geo)
• Oil and gas developments in Pennsylvania in 1978 / by Robert G. Piotrowski ... [et al.].
• Oil and gas developments in Pennsylvania in 1979 / compiled by Robert G. Piotrowski.