Coupling for Connecting Plows Tandem.
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Coupling for Connecting Plows Tandem., patent, April 23, 1907; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth512569/: accessed April 26, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu; crediting UNT Libraries Government Documents Department.