Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
Pick-Quick Coal-Cutters at Work (booklet)
Content summary - specifications of Pick-Quick coal cutters and the underground conditions in which they are suited to operate. 112 pages, illustrated throughout.
Nid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.