Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
Groesfaen Colliery (report)
Report containing specifications of the Groesfaen and Penygarreg shafts at Groesfaen Colliery. Undated. Three pages, stapled.
Nid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.