Pusher Attachment for Tractors. Page: 2 of 4
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Pusher Attachment for Tractors., patent, August 24, 1920; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth1258712/m1/2/: accessed July 17, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu; crediting UNT Libraries Government Documents Department.