[Alphonse Penaud design for twin-propeller monoplane with large wing]

Illus. in: Progress in flying machines / by O. Chanute, C.E. New York : The American Engineer and Railroad Journal, [1894].
Published in: The tradition of technology : Landmarks of Western technology ... / Leonard C. Bruno. Washington, D.C. : Library of Congress, 1995, p. 255.