Geological Survey (U.S.) (cartographer)1949Surveyed in 1938-39.Relief indicated by contours and spot heights.On verso: explanation and history of topographic maps of the U.S. and standard symbols used.utlmaps:11ca6bea-6b38-4c16-a119-6775213f3e4dnot applicable[Washington, D.C.?] : U.S. Geological Survey, [1949]http://rightsstatements.org/vocab/NoC-US/1.0/Texas Historical Topographic Maps44 x 39 cm.Glasscock County (Tex.) -- Maps.Howard County (Tex.) -- Maps.Texas -- Maps.Texas Big Spring South quadrangle : 15--minute series United States Dept. of the Interior, Geological Survey.mapscartographicTopographic maps