Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
Hafodyrynys Colliery development project, report
Folder containing reports, tables and plans relating to the Hafodyrynys New Mine development project. Dated 1955.
Nid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.