Canolbwyntio ar drafnidiaeth mae John Hardy ar yr ymweliad hwn ag archif Radio Cymru. John Hardy focuses on transport on this visit to the Radio Cymru archive. Show more
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Canolbwyntio ar drafnidiaeth mae John Hardy ar yr ymweliad hwn ag archif Radio Cymru. John Hardy focuses on transport on this visit to the Radio Cymru archive. Show more