[O'Connor Brothers General Business Ledger: July 1899 - March 1939], book, 1899-07-13/1939-03-01; (https://texashistory.unt.edu/ark:/67531/metapth982589/m1/44/: accessed July 16, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .