General Soil Map, Grayson County, Texas, map, 1980; (https://texashistory.unt.edu/ark:/67531/metapth130291/m1/1/: accessed April 19, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .
General Soil Map, Grayson County, Texas, map, 1980; (https://texashistory.unt.edu/ark:/67531/metapth130291/m1/1/: accessed April 19, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .