Geological Survey, Roeske, R. H., & Pima County. Board of Supervisors. (1978). Areas subject to inundation by the 100-year flood in Avra Valley, Pima County, Arizona. Department of the Interior, United States Geological Survey.
Chicago Style (17th ed.) CitationGeological Survey, R. H. Roeske, and Pima County. Board of Supervisors. Areas Subject to Inundation by the 100-year Flood in Avra Valley, Pima County, Arizona. [Reston, Va.]: Department of the Interior, United States Geological Survey, 1978.
MLA (8th ed.) CitationGeological Survey, et al. Areas Subject to Inundation by the 100-year Flood in Avra Valley, Pima County, Arizona. Department of the Interior, United States Geological Survey, 1978.
Warning: These citations may not always be 100% accurate.