Gresffordd - 90 mlynedd
90 mlynedd ers trychineb glofa Gresffordd, Wrecsam, Mark Lewis Jones sy'n cofio'r digwyddiad. Mark Lewis Jones remembers 90 years since the Gresford Colliery disaster in Wrexham.
Radio Cymru,1 episodes
90 mlynedd ers trychineb glofa Gresffordd, Wrecsam, Mark Lewis Jones sy'n cofio'r digwyddiad. Mark Lewis Jones remembers 90 years since the Gresford Colliery disaster in Wrexham.
Radio Cymru,1 episodes