Disgrifiad
Ty Mawr Colliery, Pontypridd; series of notes produced by David Leighton (2000), Stephen Hughes (1995) and Geoff Ward (2003)accompanied by measured drawings and annotated section of Ordnance Survey 25 inch map.
Cofnod Casglu
NMR Site Files
Cyfrwng
Text, Graphic, Cartographic.
Cychwynnwr
Stephen R. Hughes, Mr Geoff A. Ward, David K. Leighton
