Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
Amalgamated Anthracite Collieries Limited (article)
Article in two parts reprinted from Colliery Engineering, April and May 1947. 16 pages, stapled. Illustrated throughout.
Nid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.