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Gallaspy, Benjamin E. & McCarty, Alexander H.Railway-Crossing.,
patent,
June 21, 1910;
[Washington D.C.].
(https://texashistory.unt.edu/ark:/67531/metapth510278/:
accessed July 17, 2024),
University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu.;
crediting UNT Libraries Government Documents Department.