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Amgueddfa Cymru – Museum Wales
O.S. map of Neath and Dulais lower showing Ynysgeron Pit, Brynteg, Crynant, Maes Mawr, Dulais Resolves, Dulais Merthyr, Glyn Merthyr, New Gored Merthyr, Tor Cefn, Cwmbrian Mercantile and Tareni Collieries and Pentre Haiarn level, 1921 Scale : 6" to 1 mile
