Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
Data for 56 furnaces (U.K.) basic iron practice
Typed in black ink on cream paper. Information is presented in a table. Two pages. Data for 56 blast furnaces (U.K.) basic iron practice.
Nid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.