Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
Collection of coal seam plans, Amman Valley
Plan - Coal Commission (not dated) Lower Trichwant seam, Amman Valley Scale : 6" to 1mile
Nid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.