Tham khảo Avro_531_Spider

Ghi chú
  1. ↑ Jackson 1990, p.161.
Tài liệu
  • Donald, David, ed. The Complete Encyclopedia of World Aircraft. New York: Barnes & Noble Books, 1997, ISBN 978-0-7607-0592-6.
  • Jackson, A.J. Avro Aircraft since 1908. London: Putnam Aeronautical Books, 1990. ISBN 0-85177-834-8.
  • Taylor, Michael J. H. Jane's Encyclopedia of Aviation. London: Studio Editions, 1989, p. 93.
  • World Aircraft Information Files. London: Bright Star Publishing, File 889, Sheet 94.