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Dewis pwnc arall neu clirio pob hidlydd.
Rhyddhawyd ar: 5 February 2021 | Gwybodaeth gorfforaethol
Rhyddhawyd ar: 17 January 2022 | Gwybodaeth gorfforaethol
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Summary findings of the testing of personal well-being questions in two minority languages spoken in the UK
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Rhyddhawyd ar: 3 September 2021 | Gwybodaeth gorfforaethol
