Ga.-S.C.-N.C. Walhalla sheet /
MLA
Geological Survey (U.S.). "Ga.-S.C.-N.C. Walhalla sheet /." University of Georgia. Map and Government Information Library. 1921, https://dlg.usg.edu/record/dlg_topos_usgs30-walhalla-1892-1921#item.
APA
Geological Survey (U.S.) (1921). Ga.-S.C.-N.C. Walhalla sheet /. Retrieved from https://dlg.usg.edu/record/dlg_topos_usgs30-walhalla-1892-1921#item
Chicago
Geological Survey (U.S.). "Ga.-S.C.-N.C. Walhalla sheet /." 1921. July 23, 2025. https://dlg.usg.edu/record/dlg_topos_usgs30-walhalla-1892-1921#item.
