Cite
MLA (8th Edition)
Ryder, Robert T. Geologic Cross Section C-C' through the Appalachian Basin From Erie County, North-Central Ohio, to the Valley and Ridge Province, Bedford County, South-Central Pennsylvania. U.S. Dept. of the Interior, U.S. Geological Survey, 2012.
APA (7th Edition)
Ryder, R. T. (2012). Geologic cross section C-C' through the Appalachian basin from Erie County, north-central Ohio, to the Valley and Ridge Province, Bedford County, south-central Pennsylvania. U.S. Dept. of the Interior, U.S. Geological Survey.
Chicago (17th Edition)
Ryder, Robert T. “Geologic Cross Section C-C' through the Appalachian Basin from Erie County, North-Central Ohio, to the Valley and Ridge Province, Bedford County, South-Central Pennsylvania.” Reston, Va.: U.S. Dept. of the Interior, U.S. Geological Survey, 2012.