Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
Glen Colliery, plan
Plan showing underground workings at Glen Colliery Red Vein. Scale 1:2500. Dated December 1975.
Nid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.
Amgueddfa Cymru
Plan showing underground workings at Glen Colliery Red Vein. Scale 1:2500. Dated December 1975.