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Amgueddfa Cymru – Museum Wales
Handwritten in pencil and on off-white, blue ruled paper. Two pages (with notes on the front of the first page and the back of the second page) entitled 'comparison of steam and electric collieries'. Dated 12-11-25. Loose within a beige/light brown file with all other documents with the accession number 83.184I/70. The file is labelled 'Steam and Electric Collieries'.
