Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
Ironbridge, film slide
Collection of slides forming lecture "Rails in the Slate Industry" by D.R. Geering, UMIST 3rd year Mechanical Engineering Projects, c.1975 (copy of lecture notes in related material).
Ironbridge - the first large iron bridge, constructed by Abraham Darby, 1777-9
Nid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.