Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
British Iron & Steel Federation, report
Typed in black ink on cream paper. 8 pages stapled together. "British Iron & Steel Federation Technical Department: notes on research into British blast furnace stove practice." Circulated to members of the air blast and blast furnace practice sub-committees July 1934.
Nid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.