Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
Surface Extensions at Snowdown Colliery (article)
Article reprinted from Colliery Engineering, December 1930. 16 pages, stapled. Illustrated throughout.
Nid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.