Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
Notes
Handwritten in pencil on off-white, blue ruled paper. Notes referring to compressed air production figures. Loose within pink/peach card file with other documents relating to Middle Duffryn and Bargoed High Pressure Station.
Nid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.