Haycraft, William R. (2000) Yellow Steel: The Story of the Earthmoving Equipment Industry University of Illinois Press, Urbana, Illinois, páginas 183-184, ISBN 0-252-02497-4
Haycraft, William R. (2000) Yellow Steel: The Story of the Earthmoving Equipment Industry University of Illinois Press, Urbana, Illinois, página 260, ISBN 0-252-02497-4
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Will, Oscar H. (2007) Payline: International Harvester's Construction Equipment Division MBI, St. Paul, Minnesota, página 144, ISBN 978-0-7603-2458-5