Changes

*[https://archive.org/details/1914-manual-royal-flying-corps-pt-1/page/n19/mode/2up ''Training Manual, Royal Flying Corps, Part 1 (Provisional) 1914''] (40/War Office/2054). HMSO 1914. Archive.org

*''The King's Regulations and Orders for the Royal Air Force, 1918'' [https://archive.org/details/kings-regulations-royal-air-force-1918/page/n9/mode/2up Archive.org], [https://archive.org/details/kings-regulations-royal-air-force-1918/page/n11/mode/2up Contents], [https://books.google.com.au/books?id=nHF3YDwirRYC&pg=PP9 Google Books].

*[https://archive.org/details/PermanentOrganizationOfTheRoyalAirForce1919/mode/2up ''Permanent Organization of the Royal Air Force . Note by the Secretary of State for Air on a Scheme Outlined by the Chief of the Air Staff'' [H M Trenchard<nowiki>]</nowiki>] Presented to Parliament. HMSO 1919 Archive.org

*[http://access.bl.uk/item/viewer/ark:/81055/vdc_100022541314.0x000002 ''Pigeon Service Manual (Royal Air Force)''] Air Ministry publication HMSO 1919. British Library Digital Collection.

*For younger readers.

**[https://archive.org/details/in.ernet.dli.2015.241464 ''Biggles Pioneer Air Fighter''] by Captain W E Johns 1954. Archive.org, Digital Library of India Collection. Set in WW1. Contains thirteen short stories, eleven of which were originally published in ''The Camels Are Coming'' (1932) and two of which were originally published in ''Biggles Of The Camel Squadron'' (1934), originally written for older adolescents. Note however Wikipedia states "The early First World War books were reprinted in the 1950s, when the Biggles books had acquired a younger readership, and were bowdlerised".

**[https://archive.org/details/in.ernet.dli.2015.16163 ''Biggles Sees It Through''] by Captain W E Johns 1941 Archive.org, Digital Library of India Collection. Set in WW2.