Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
M.R.D.E. Projects 1977/8 (booklet)
Full title - Mining Research and Development Establishment Projects 1977/8. 49 page booklet with black covers.
Nid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.