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WikiPedia: Northrop_YB-35 http://www.flightglobal.com/pdfarchive/view/1947/1... http://books.google.com/books?id=kiEDAAAAMBAJ&pg=P... http://www.scribd.com/doc/50206334 http://www.nationalmuseum.af.mil/factsheets/factsh... http://www.nationalmuseum.af.mil/factsheets/factsh... http://home.att.net/~jbaugher2/b35.html https://web.archive.org/web/20070528031219/http://... https://commons.wikimedia.org/wiki/Northrop_XB-35?...