1. Cambro-Ordovician strata in northwest Georgia and southeast Tennessee, the Knox Group and the Sequatchie Formation Publication/Creation: Atlanta, Ga. : Georgia Geological Society, [1992] Resource Type: Book Access & Availability: Loading
2. The Chopawamsic Formation-- : a new stratigraphic unit in the Piedmont of northeastern Virginia Author/Creator: Southwick, D. L. 1936- (David Leroy) Publication/Creation: [Washington] : [U.S. Govt. Print. Off], [1971] Resource Type: Book Access & Availability: Loading