Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
The North Wales Coalfield (leaflet)
Content summary - information on the history, reserves and prospects of the North Wales Coalfield. One sheet folded. Green front cover. Undated.
Nid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.