Tham khảo Boeing YB-40 Flying Fortress

Ghi chú

    Citations

      Tài liệu

      • Bishop, Cliff T. Fortresses of the Big Triangle First. Elsenham, UK: East Anglia Books, 1986. ISBN 1-869987-00-4.
      • Freeman, Roger A. The Mighty Eighth War Diary. St. Paul, Minnesota: Motorbooks International, 1990. ISBN 0-87938-495-6.
      • Freeman, Roger A. The Mighty Eighth War Manual. St. Paul, Minnesota: Motorbooks International, 1991. ISBN 0-87938-513-8.
      • Galland, Adolf. The First and the Last: Germany's Fighter Force in WWII (Fortunes of War). South Miami, Florida: Cerberus Press, 2005. ISBN 1-84145-020-0.