Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
Tydraw & Glenrhondda Collieries, plan
Full title - Tydraw & Glenrhondda Collieries. Gorllwyn Seam. Scale 6" to a Mile. Datum for Levels - 2000' B.O.D.
Nid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.