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Y GRÅ´P CYMREIG THE WELSH GROUP
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Heno, S4C: 2018
Erthygl ar gyhoeddiad ac arddangosfa "Y Grwp Cymreig yn 70" yn Oriel Y Bont, Pontypridd.
Darllediad cyntaf am 7pm ar 19eg Tachwedd 2018, ar y rhaglen Heno, ar sianel S4C.
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