http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
State of Texas, highlighting low-lying areas derived from USGS digital elevation data
1 map : color ; 70 x 77 cm., on sheet 92 x 104 cm.
by John J. Kosovich ; U.S. Department of the Interior, U.S. Geological Survey.
Relief shown by shading and gradient tints.