Ymweliad arall ag archif Radio Cymru wrth i John Hardy ganolbwyntio ar ddiwydiant. John Hardy focuses on industry as he makes another visit to the Radio Cymru archive.
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Ymweliad arall ag archif Radio Cymru wrth i John Hardy ganolbwyntio ar ddiwydiant. John Hardy focuses on industry as he makes another visit to the Radio Cymru archive.
Mae Radio Cymru wedi bod yn darlledu rhaglenni ers 1977. Radio Cymru has been broadcasting to the nation since 1977.
