Petroleum geology of the Devonian and Mississippian black shale of eastern North AmericaJohn B. Roen, Roy Clark Kepferle · First published 1993Open the Tome
Stratigraphic framework of the Devonian black shales of the Appalachian basinJohn B Roen · First published 1984Open the Tome
Preliminary stratigraphic cross section showing radioactive zones in the Devonian black shales in southeastern Ohio and west-central West VirginiaLaure G. Wallace, John B. Roen, De Witt, Wallace Jr · First published 1978Open the Tome
