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Chemical quality of the water in the Tucson basin, Arizona
1 online resource (56 unnumbered pages) : illustrations, maps.
"Prepared in cooperation with the city of Tucson, the U.S. Bureau of Reclamation, and the University of Arizona."
Includes National Geologic Map Database index page and 4 plates on HTML page.
Includes bibliographical references (pages 43-44) and index.
Santa Cruz River Watershed (Ariz. and Mexico)
Geological Survey water-supply paper ; no. 1939-D