Vibrating Churn., patent, June 23, 1891; (https://texashistory.unt.edu/ark:/67531/metapth172727/m1/1/: accessed April 26, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .
Vibrating Churn., patent, June 23, 1891; (https://texashistory.unt.edu/ark:/67531/metapth172727/m1/1/: accessed April 26, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .