Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
Electrical Earthing in Coal Mines (booklet)
45 page booklet with yellow and black covers, stapled at centre.
Nid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.
Amgueddfa Cymru
45 page booklet with yellow and black covers, stapled at centre.