1. Maclay, R.W., and Small T.A., 1976, Progress report on geology of the Edwards aquifer, San Antonio area, Texas, and preliminary interpretation of borehole geophysical and laboratory data on carbonate rocks: U.S. Geological Survey Open-File Report 76-627, 65 p.
  2. Maclay, R.W.,1995, Geology and hydrology of the Edwards aquifer in the San Antonio Area, Texas: US Geological Survey Water-Resources Investigation Report 95-4186 55p.
  3. Rose, P.R., 1972, Edwards Group, surface and subsurface, central Texas: Austin, University of Texas, Bureau of Economic Geology Bulletin 3232, 1,007p. Schultz, A.L., Using geophysical logs in the Edwards aquifer to estimate water quality along the freshwater/saline-water interface (Uvalde to San Antonio, Texas) 92-03,
  4. Walthour, S.D., 1997, Edward aquifer hydrogeologic report for 1998, report 98-02, 27p.