Cite
MLA (8th Edition)
Stratigraphic Framework of Cambrian and Ordovician Rocks In the Central Appalachian Basin From Richland County, Ohio to Rockingham County, Virginia. For sale by Map Distribution, The Survey, 1991.
APA (7th Edition)
Stratigraphic framework of Cambrian and Ordovician rocks in the central Appalachian Basin from Richland County, Ohio to Rockingham County, Virginia. (1991). For sale by Map Distribution, The Survey.
Chicago (17th Edition)
“Stratigraphic Framework of Cambrian and Ordovician Rocks in the Central Appalachian Basin from Richland County, Ohio to Rockingham County, Virginia.” Denver, CO: For sale by Map Distribution, The Survey, 1991.