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Oram, John M.; Sutton, Henry M. & Garrett, Henry.Telephone Call Box.,
patent,
January 29, 1884;
Washington D.C..
(https://texashistory.unt.edu/ark:/67531/metapth170690/:
accessed June 27, 2024),
University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu.;
crediting UNT Libraries Government Documents Department.