Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
National Coal Board, press release
Press release relating to an experiment at Oakdale and Penrikyber collieries to use 'paper strengthened with fibreglass' to help control and contain coal dust. Dated 1 July 1971. One page.
Nid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.