Haddow, G.W. and Peter M. Grosz. The German Giants, The German R-Planes 1914-1918. New York, Funk & Wagnalls, 1962. 310 pages, photo illus, 4to (11x9") dust jacket. Extensive coverage including photos, drawings and specifications of the large WWI German bombers. Important reference not regularly offered for sale. Good w/fair dj (chipped, edge tears).