SIX years ago the present author contributed a paper on “Aviation Spirit: Past, Present and Future,” before the International Air Congress, London, 1923.
Dunstan, A.E. (1929), "Fuels and Dopes for Aircraft Engines: A Review of the Requirements and Progress Made in the Past Six Years Towards Meeting Them", Aircraft Engineering and Aerospace Technology, Vol. 1 No. 10, pp. 344-346. https://doi.org/10.1108/eb029213
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