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Amgueddfa Cymru – Museum Wales
Full title - Mining School Britannia. Pneumatic Picks for Coal-Getting. Paper by Messrs J. Shenton and T. Powell. Pooled Contributions of the Written Comments Received on Above Paper and the Authors' Reply. Powell Duffryn Colliery Officials' and Students' Association. Session 1939-40. 27 page booklet.
