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Galbraith, David G. & Galbraith, Nannie L.Paper Clip,
patent,
May 10, 1910;
[Washington D.C.].
(https://texashistory.unt.edu/ark:/67531/metapth513650/:
accessed June 1, 2024),
University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu;
crediting UNT Libraries Government Documents Department.