Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
Summary of the Project for the Development of Nantgarw Colliery (report)
59 pages with eight additional pages of plans. Documents dated 1940s-1950s.
Nid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.