Geologic map of the Poverty Spring quadrangle, northern Mohave County, Arizona / by George H. Billingsley ; U.S. Department of the Interior, U.S. Geological Survey (Open-file report ; 97-493)
Geologic map of the Poverty Spring quadrangle, northern Mohave County, Arizona / by George H. Billingsley ; U.S. Department of the Interior, U.S. Geological Survey