TexasUnited States. Army. Corps of Engineers (cartographer)1931-01-01Tactical Map."Minor revisions under the direction of Engineer, Eight Corps Area, 1922 and 1931."Relief indicated by contours and spot heights.utlmaps:4282a4b4-f2b5-4ec8-a259-bfb03857a036Englishhttps://creativecommons.org/publicdomain/mark/1.0/Texas Historical Topographic Maps45 x 39 cm.Topographic mapsTexas--MapsTexas Chisos Mine quadrangle : grid zone E Corps of Engineers, U.S. Army.MapsTopographic mapsCartographic