Armoured Division. Pen & Sword Battleground Europe. 2001. ISBN 978-0-85052-815-2. Russel Weigley. Eisenhower's Lieutenants: The Campaign of France and Germany
May 20, 2008. O'Dwyer, William J. History by Contract: The Beginning of Motorized Aviation, August 14, 1901: Gustave Whitehead, Fairfield, Conn.. Leutershausen