Automatic Heat-Regulator for Incubators., patent, March 29, 1921; (https://texashistory.unt.edu/ark:/67531/metapth1258251/m1/3/: accessed July 12, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
Automatic Heat-Regulator for Incubators., patent, March 29, 1921; (https://texashistory.unt.edu/ark:/67531/metapth1258251/m1/3/: accessed July 12, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .