Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
Plan
Section through South Wales Coalfield (Monmouthshire Area) Horizontal section from Rhumney to Cwmbran showing strata at Pochin and Llanhilleth Collieries, 1908
Nid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.