found: Work cat.: Franks, N. Dolphin and Snipe aces of World War 1, 2002:back cover (the last of the famous Sopwith fighters to enter service during World War 1, the Dolphin and the Snipe ...)
found: Wikipedia, 16 Feb. 2010:under Sopwith Dolphin (the Sopwith 5F.1 Dolphin was a British fighter aircraft manufactured by the Sopwith Aviation Company; it was used by the Royal Flying Corps and its successor, the Royal Air Force, during the First World War; the Dolphin entered service on the Western Front in early 1918 and proved to be a formidable fighter)
found: Virtual Aircraft Museum website, 16 Feb. 2010:Aircraft Directory, United Kingdom, Sopwith aircraft (Sopwith 5F.1 Dolphin, 1917)
