Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
South Wales Collieries, plans of coal seams
Plan of Bargoed Colliery, South Section, details of Bargoed North and South Pit, Brithdir and Britannia North Pit.
Nid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.