Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
Relating the Belt Conveyor to its duty (booklet)
Information Bulletin No. MM(51)9. '51/53' handwritten beneath bulletin number. 4 pages, 2 diagram and a table.
Nid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.