Improvement in Scrapers., patent, June 16, 1874; (https://texashistory.unt.edu/ark:/67531/metapth166973/m1/2/: accessed July 17, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .
Improvement in Scrapers., patent, June 16, 1874; (https://texashistory.unt.edu/ark:/67531/metapth166973/m1/2/: accessed July 17, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .