http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Delineation of the outcrop of the Edwards Aquifer hydrologically associated with Barton Springs in the Austin Area, Texas
Department of the Interior, United States Geological Survey ; A.F. Ardis, D.L. Slagle, and F.R. Snyder ; prepared in cooperation with the city of Austin, Texas.
Relief shown by contours and spot heights.
Includes text, bibliographical references, and index map.
U.S. Geological Survey open-file report ; 85-643