Defaid yw'r thema ar ymweliad wythnosol John Hardy ag archif Radio Cymru. John Hardy focuses on sheep on this visit to the Radio Cymru archive.
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Defaid yw'r thema ar ymweliad wythnosol John Hardy ag archif Radio Cymru. John Hardy focuses on sheep on this 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.
