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Amgueddfa Cymru – Museum Wales
The questionnaires stapled together. Typed in black ink on cream paper. Full title: 'Coke Producers Return - Coke for Basic Iron. Questionnaire: The quality of blast furnace coke.' Questionnaires containing data for 4th quarter 1949 (x2) and for the 4th Quarter 1950 for Guest Keen Baldwins Iron & Steel Co. Ltd., East Moors Works, Cardiff.
