"P.108, la Fortezza della Regia". (in Italian) Great Planes monographes, N.27, March 2007. Parma, Italy: West-ward edizioni. External links P108B.htm Piaggio P.108 SITE IS DOWN 15 October 2007 Piaggio P.108 (Russian language) Comando Supremo P.108 Regia Marina site, with P.108 article Special Hobby 72nd Scale Plastic Model Review P.108 1930s Italian bomber aircraft World War II Italian bombers Four-engined tractor aircraft Low-wing aircraft Aircraft first flown in 1939 World War II heavy bombers Four-engined piston aircraft