Stratigraphic framework of Cambrian and Ordovician rocks in the central Appalachian Basin from Richland County, Ohio to Rockingham County, Virginia U.S. Department of the Interior, U.S. Geological Survey ; by Robert T. Ryder
Series Titles:
Miscellaneous investigations series ; map I-2264 Miscellaneous investigations series (Geological Survey (U.S.)) ; map I-2264.
Variant Titles:
Appalachian Basin from Richland County, Ohio to Rockingham County, Virginia