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Royal Flying Corps 1914-18. Stroud: The History Press. p. 204. ISBN 9780750960052. Gunn, Roger (2013). Raymond Collishaw and the Black Flight. Toronto:...16 KB (1,639 words) - 21:02, 4 March 2023
(2014). Royal Flying Corps Handbook 1914-18. The History Press. ISBN 978-0750960052. (Chapter 3) Jefford, C. G. (2001). Observers and Navigators: And Other...21 KB (2,558 words) - 16:33, 11 March 2024
