Banker's Daily-Balance Index. Page: 4 of 4
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Banker's Daily-Balance Index., patent, April 30, 1895; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth173979/m1/4/: accessed July 16, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu; crediting UNT Libraries Government Documents Department.