Soil map, Texas, San Antonio sheet, map, 1904; (https://texashistory.unt.edu/ark:/67531/metapth19677/m1/1/: accessed March 21, 2025), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .
Soil map, Texas, San Antonio sheet, map, 1904; (https://texashistory.unt.edu/ark:/67531/metapth19677/m1/1/: accessed March 21, 2025), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .