1. Cenozoic stratigraphy and geologic history of southwestern Arizona: Geological Society of America Bulletin;Eberly,1978
2. Description and generalized distribution of aquifer materials in the alluvial basins of Arizona and adjacent parts of California and New Mexico: U.S. Geological Survey Hydrologie Investigations Atlas HA-663, 4 sheets, scale 1:500,000.;Freethey,1986