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Amgueddfa Cymru – Museum Wales
Twenty three pages attached with a split pin. Pre-printed cost sheets, printed in black and red ink on lined paper, with printed columns. Details are typed in black and red ink. The first two pages are typed in black ink on plain cream paper. British (Guest Keen Baldwins) Iron & Steel Co. Ltd. cost sheet for Margam Works, Port Talbot Works, Briton Ferry blast furnaces and Cornelly quarry. Cost sheets for 4 weeks ending 28th June, 1930.
