Georgia Irwinton Quadrangle /
MLA
Geological Survey (U.S.). "Georgia Irwinton Quadrangle /." University of Georgia. Map and Government Information Library. 1920, https://dlg.usg.edu/record/dlg_topos_usgs15-irwinton-1916-1963#item.
APA
Geological Survey (U.S.) (1920). Georgia Irwinton Quadrangle /. Retrieved from https://dlg.usg.edu/record/dlg_topos_usgs15-irwinton-1916-1963#item
Chicago
Geological Survey (U.S.). "Georgia Irwinton Quadrangle /." 1920. October 21, 2026. https://dlg.usg.edu/record/dlg_topos_usgs15-irwinton-1916-1963#item.
