Areas subject to inundation by the 100-year flood in Avra Valley, Pima County, Arizona
Roeske, R.H., 1978, Areas subject to inundation by the 100-year flood in Avra Valley, Pima County, Arizona: U.S. Geological Survey Water-Resources Investigations 78-0033 Open-File Report, 1 sheet, scale 1:62,500.