Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
Mining School Britannia (booklet)
'Mining School Britannia. Belt Conveying by Messrs A. Tait, S.G. Bassett and R.L. Lachmere-Oertel. Pooled Contributions of the Written Comments Received on Above Paper and the Authors' Reply. Powell Duffryn Colliery Officials and Students' Association. Session 1939-40'. 12 page booklet.
Nid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.