Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
Mining School Britannia (booklet)
'Mining School Britannia. Planning at the Coal Face by Mr M. Hughes, M.E. Powell Duffryn Colliery Officials' and Students' Association. Session 1937-38'. 20 page booklet.
Nid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.