Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
Mining School Britannia (booklet)
'Mining School Britannia. Difficulties of Underground District Officials. By Messrs A.T. Minhinnick, D.L. Jones and A.L. Green. Powell Duffryn Colliery Officials' and Students' Association. Session 1938-39'. 22 page booklet.
Nid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.