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1Cyhoeddwyd 1986
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2Cyhoeddwyd 1983
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3Cyhoeddwyd 1998
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4Cyhoeddwyd 1984
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5Cyhoeddwyd 1972
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6Cyhoeddwyd 1957
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7Cyhoeddwyd 1963
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8Cyhoeddwyd 1985
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9Cyhoeddwyd 1960
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10Cyhoeddwyd 1981
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