1. Ground-water flow system and aquifer-storage monitoring networks : aquifer-storage change in the lower Canada del Oro subbasin, Pima County, Arizona, 1996-98 Author/Creator: Geological Survey (U.S.), cartographer Publication/Creation: Reston, Virginia : U.S. Department of the Interior, U.S. Geological Survey, 1999 Resource Type: Map Access & Availability: Loading