Ecoregions of Texas [Poster], poster, 2004; (https://texashistory.unt.edu/ark:/67531/metapth1662409/m1/1/: accessed July 16, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .
Ecoregions of Texas [Poster], poster, 2004; (https://texashistory.unt.edu/ark:/67531/metapth1662409/m1/1/: accessed July 16, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .