Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
South Wales Coals Their Classification and Uses (booklet)
Content summary - 'the classification, preparation and usage of coals produced in the South Wales Area''. 19 page booklet.
Nid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.