APA (7th ed.) Citation

Ryder, R. T., & Crangle, R. D., Jr. (2002). Stratigraphic framework of Cambrian and Ordovician rocks in the central Appalachian Basin from Richland County, Ohio to Rockingham County, Virginia (Online version 1.0.). U.S. Dept. of the Interior, U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Ryder, Robert T., and Robert D. Crangle, Jr. Stratigraphic Framework of Cambrian and Ordovician Rocks in the Central Appalachian Basin from Richland County, Ohio to Rockingham County, Virginia. Online version 1.0. Reston, Va.: U.S. Dept. of the Interior, U.S. Geological Survey, 2002.

MLA (9th ed.) Citation

Ryder, Robert T., and Robert D. Crangle, Jr. Stratigraphic Framework of Cambrian and Ordovician Rocks in the Central Appalachian Basin from Richland County, Ohio to Rockingham County, Virginia. Online version 1.0. U.S. Dept. of the Interior, U.S. Geological Survey, 2002.