Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
Changing to the Metric System (booklet)
Blue covered paper booklet with title printed in black on front cover. Full title - Changing to the Metric System, Conversion Factors, Symbols and Definitions. 48 pages stapled together.
Nid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.