Stratigraphic framework of Cambrian and Ordovician rocks in the central Appalachian Basin from Medina County, Ohio, through southwestern and south-central Pennsylvania to Hampshire County, West Virginia /
Ryder, Robert T.
Harris, Anita G.
Repetski, John E.
[Washington] : United States Government Printing Office ; Denver, CO : For sale by Book and Open-File Report Sales, U.S. Geological Survey,
1992.
One folded. col. map in pocket.
Includes bibliographical references (p. 27-32).
Geology, Stratigraphic
Geology, Stratigraphic
Geology