Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
Mining Technology (journal)
February 1982 Vol. 64 No.736. 64 pages stapled in centre. With paper insert showing the schedule for Design and Control of Underground Equipment Two-Day Symposium.
Nid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.