Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
National Coal Board, press release
Press release relating to the introduction at Cynheidre Colliery of a 'computer monitoring system that will give warning of outbursts of methane and coal dust'. Dated 28 October 1980. Two pages.
Nid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.