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Amgueddfa Cymru – Museum Wales
Volume of Notices of Accidents or Dangerous Occurrences at Graig Merthyr Colliery and Clydach Merthyr Colliery in Swansea Area, 1938-1945, as reported to H.M. Inspectors of Mines. Contains 33 forms (one form loose) and also two typed letter attached to first page
