Seed-Tester, patent, October 7, 1913; (https://texashistory.unt.edu/ark:/67531/metapth853663/m1/1/: accessed April 25, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .
Seed-Tester, patent, October 7, 1913; (https://texashistory.unt.edu/ark:/67531/metapth853663/m1/1/: accessed April 25, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .