Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
Mining School Britannia (booklet)
'The Powell Duffryn Steam Coal Company Limited. The Training of Colliery Officials. The Mining School. Prospectus and Syllabuses'. 20 pages, stapled.
Nid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.