Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
The Development of a Tertiary Coal Concession in Kalimantan (Borneo), article
Nine page article by William Arthur Lewis written whilst a Mining Consultant in East Kalimantan.
Nid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.