Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
Booklet
Black and red card cover. Inside, text is printed in black ink on white paper. 52 page illustrated booklet. Full title - Radiant Heat from Air Floated Pulverized Coal. Bulletin Number 12 Revised Second Edition.
Nid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.