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Amgueddfa Cymru – Museum Wales
Ordnance Survey Map showing route of the Cilfynydd to Sharpness 400KV line Sheet ST 28 SW, 1964
O.S. Map sheet ST28NW Provisional Edition. Scale 1:10.560 or 6 inches to 1 mile. Route map Cilfynydd - Sharpness 400KV sheet 16 Glamorgan-Monmouthshire. - Sian Williams
