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Amgueddfa Cymru – Museum Wales
Three letters and two articles re. research into oil engine development. Letters addressed to Mr H.A. Thomas. One letter from The Commercial Motor, typed on headed paper; one letter from The Austin Motor Company typed on headed paper; also one handwritten letter from unknown. Two articles: title:- "20 years of oil engine development" by Mr C.B. Dicksee. title: "A decade of progress in engine design : Part 1 the compression-ignition power unit"
