Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
The Maen-Offeren Slate Quarry Co. Ltd. (booklet)
32 pages illustrated with b/w photographs.
Nid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.
Amgueddfa Cymru
32 pages illustrated with b/w photographs.