فورد ثلاثية المحرك: الفرق بين النسختين

| accessdate = 12 April 2015 | مسار الأرشيف = http://web.archive.org/web/20180417105340/https://www.flightglobal.com/pdfarchive/view/1930/untitled0%20-%201308.html | تاريخ الأرشيف = 17 أبريل 2018 }}</ref><ref>[http://www.nasm.si.edu/research/aero/aircraft/fordtri.htm "Ford Trimotor."]{{webarchive |url=https://web.archive.org/web/20060423084858/http://www.nasm.si.edu/research/aero/aircraft/fordtri.htm |date=April 23, 2006 }} ''Smithsonian''. Retrieved: July 14, 2010.</ref><ref>{{cite journal | quotes = | last = National Smokejumpers Association| first = | year = 1997| title = Missed Flight - Ralph Johnston, RDD '63 | journal = The Statis Line | volume = 4-2| issue =April| pages = | url = http://smokejumpers.com/documents/magazine_pdfs/staticline-1997-04-10.7MB.pdf| accessdate =September 6, 2013}}</ref>