D.T.D. Aluminium and Light Alloys † 18C Light Alloy Forgings and Stampings.
(1932), "Official D.T.D. Specifications: The Latest List of Requirements Called for by The Air Ministry Technical Department", Aircraft Engineering and Aerospace Technology, Vol. 4 No. 3, pp. 72-72. https://doi.org/10.1108/eb029522
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