Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
A 'Horizon' Mine of the Electronic Age (pamphlet)
Content summary - pamphlet containing illustrations of scenes at a modern colliery, both underground and on the surface. One sheet of paper folded.
Nid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.