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Simmons, William L.Improved in Medical Compounds or Liver Invigorators.,
patent,
January 9, 1872;
[Washington D.C.].
(https://texashistory.unt.edu/ark:/67531/metapth165318/:
accessed July 11, 2024),
University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu.;
crediting UNT Libraries Government Documents Department.