found: Wilson, E.D. Geology and mineral deposits of southern Yuma County ... 1933.
found: Flood insurance study, 1984:cover (La Paz County, Arizona) p. 5 (La Paz County was formed on Jan. 1, 1983, out of the northern part of Yuma County ...)
found: Arizona's names, 1983(Yuma County; created 1868 as one of four original counties of Arizona)
found: GeoNames, algorithmically matched, 2009(adm2; 32°45ʹ05ʺN 113°46ʹ03ʺW)
found: GNIS, November 14, 2018(Yuma County, civil, Arizona, variant names: Castle Dome County, Dona Ana County; one of the four original counties established in 1864 when Arizona became a territory. When it was part of New Mexico Territory it was part of Castle Dome County and Dona Ana County at different times)