Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
Burdening of Blast Furnaces (article)
"Burdening Blast Furnaces" Typed in black in on cream paper. Thirteen pages attached with a paperclip.
Nid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.