Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
Mining Technology (journal)
October 1982 Vol. 64 No.744 40 pages stapled in centre. With paper inserts of two visitor tickets to An Exhibition and Symposium for Computer-based Mine Management Inofrmation Technology.
Nid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.