Reprint. Originally published under title: Jane's all the world's aircraft. London : Jane's, 1919.
"... has supplemented the 1919 material by extracting entries on significant military aircraft from the 1914, 1916, 1917 and 1918 editions (there was no 1915 edition). Pictures missing in the original material have also been supplied from other sources wherever possible"--T.p. verso.