Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
The Crossland Hinged Chute and Conveyor Control (booklet)
Information Bulletin No. EM(51)2. '47' handwritten beneath bulletin number. 2 pages and a diagram.
Nid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.