Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
Coal Dust Explosion in Mines (report)
Lecture notes prepared for a seminar/course. 34 pages with additional pages of graphs.
Nid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.
Amgueddfa Cymru
Lecture notes prepared for a seminar/course. 34 pages with additional pages of graphs.