Alexander. A., Armor Development in the Soviet Union and the United States. A report for Director of Net Assessment, Office of the Secretary of Defense, R-1860-NA (Santa Monica, CA: Rand, September 1976).
Benson, C.C., "The New Christie, Model 1940," Army Ordnance, September/October 1929, 112.
Christie Tanks www.geocities.com/firefly1002000/christanks.html
Georgano, G.N., The Beaulieu Encyclopedia of the Automobile, reprint ed. (London: Taylor and Francis, 2000).
Gillie, M.H., Forging the Thunderbolt: History of the U.S. Army's Armored Forces, 1917-45 (Mechanicsburg, PA: Stackpole Books, 2006).
HETS (Heavy Equipment Transporter System) www.fas.org/man/dod-101/sys/land/hets.htm
History of the Tank www.globalsecurity.org/military/systems/ground/tank-history1.htm
Hofmann, G.F., "A Yankee Inventor and the Military Establishment: The Christie Tank Controversy," Military Affairs 39 (1975): 12-18.
Hofmann, G.F. and D.A. Starry, Camp Colt to Desert Storm: The History of the U.S. Armored Forces (Lexington, KY: University of Kentucky Press, 1999).
Hofmann, G., "Doctrine, Tank Technology, and Execution: I.A. Khalepskii and the Red Army's Fulfillment of Deep Operations," The Journal of Slavic Military Studies 9 (1996): 288-327.
Hofmann, G.F., Through Mobility We Conquer: The Mechanization of U.S. Cavalry (Lexington, KY: University Press of Kentucky, 2006).
Holt, L., "Flying Tanks That Shed Their Wings," Modern Mechanics and Inventions, July 1932, 34-37, 167, 170, 176.
Japanese Winged Tank mailer.fsu.edu/~akirk/tanks/japan/japan-exp.html
Pittman, W., "The Los Angeles Fire Department's Nine Mechanical Horses," Los Angeles Fire Department Historical Archive, 1988, www.lafire.com/fire_apparatus/1913-1923_tractors/1913-1923_tractors_pittman.htm
Russian ACVs www.globalsecurity.org/military/world/russia/bmd-4.htm
Russian BMD-4 ACV Tank www.youtube.com/watch?gl=CA&hl=en&v=uQGJh6MyBy0&feature=related
Vanderbilt Cup Races www.vanderbiltcupraces.com