Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
Mining School Britannia (booklet)
Full title - Mining School Britannia. ''Underground Roadways'' by Mr J. Shenton. Powell Duffryn Colliery Officials' and Students' Association. Session 1935-36. 15 page booklet.
Nid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.