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Amgueddfa Cymru – Museum Wales
The South Wales District (Coal Mines) Scheme, 1930. Book of the 'Classification of coals and Minimum Prices'. Revised January 1936 Edition (marked Private and Confidential). Book with a number of additional documents contained inside, some stuck into the book and others contained loosely. Those contained loosely are addendum 43, 45, 48, 49 and 6 and also a list entitled 'the reclassification of antracite duff coals'
