Automatic Heat-Regulator for Incubators. Page: 3 of 7
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Automatic Heat-Regulator for Incubators., patent, March 29, 1921; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth1258251/m1/3/: accessed June 22, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu.; crediting UNT Libraries Government Documents Department.