Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
Mining Technology (journal)
February 1979 Vol. 61 No.700. 40 pages stapled in centre. With paper insert apologising for the lateness of the issue.
Nid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.