1. On the hydrology of the Edwards Limestone, south-central Texas;Abbot;J. Hydrol.,1975
2. Arnow , T. Ground-water geology of Bexar County, Texas Water-Supply Pap. 1588 U.S. Geol. Surv. Reston, Va. 1963
3. Bedinger , M. S. F. J. Pearson Jr. E. Reed Jr. R. T. Sniegocki C. G. Stone The waters of Hot Springs National Park, Arkansas-Their origin, nature, and management Open-File Rep Little Rock, Ark. 1974
4. Rapid evaluation of solvent extraction processes;Bewick;Anal. Chem.,1948
5. Carlston , C. W. L. L. Thatcher E. C. Rhodehamel Tritium as a hydrologic tool-The Wharton Tract Study Publ. 51 503 512 Int. Ass. of Sci. Hydrol. Washington, D. C. 1960