Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
Peak Forest Truck, 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).
Preserved in the National Railway Museum, York
Nid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.