Olrhain gwreiddiau rhai o brif fudiadau Cymru. A look at Wales' most influential movements.
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Olrhain gwreiddiau rhai o brif fudiadau Cymru. A look at Wales' most influential movements.
Mae Radio Cymru wedi bod yn darlledu rhaglenni ers 1977. Radio Cymru has been broadcasting to the nation since 1977.
