Brassey's World Aircraft & Systems Directory: 1999/2000 Edition.
World Aircraft: Origins to World War 1.
World Aircraft - Origins-World War 1.
Donald, David, The Encyclopedia of World Aircraft (pg 553).
World Aircraft - Commercial Aircraft 1935-1960.
The complete Encyclopedia of World Aircraft.
Encyclopedia of World Aircraft, p.854, "Standard aircraft".
Encyclopedia of World Aircraft, p. 854, "Standard aircraft".
Jane's All the World Aircraft 1980-81.
Airlife's World Aircraft.