description of the Dornier Rs.III or Rs.IV, with rough diagrams. "The Four-engine Giant" (页面存档备份,存于互联网档案馆) Notes on German Bombers in 1918 issue of Flight
互联网档案馆的存檔,存档日期February 26, 2011,. Cecil Adams, Did Krups, Braun, and Mercedes-Benz make Nazi concentration camp ovens?互联网档案馆的存檔,存档日期June 4, 2011,. Jack