Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
Llanrwst Lead Mines Ltd., company records & docs.
Llanrwst Lead Mines Ltd., Parc Mine Orange card file containing documents and correspondence concerning lead sample analyses, 1955-1959.
Nid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.