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Amgueddfa Cymru – Museum Wales
Cardboard folder containing various documents (c.1915-1930) including coal sample test report sheets for Argoed Colliery, Tynygraig Colliery and Maesmelyn Colliery; lists of prices and wage rates for working at Blaenmawr Colliery, Corrwg Vale Colliery; notebook containing wage rates for Argoed Colliery and Maesmelyn Colliery; booklet titled 'Commercial Coal Analysis. Its Meaning and Value' by A.R. Haigh 1922.
