Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
Induced Draught Cooling Towers in Germany (booklet)
Information Bulletin No. EG(51)8. '51/43' handwritten beneath bulletin number. 2 pages and a diagram.
Nid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.