Y Prosiect Data Am Ddisgyblion Unigol Ehangu Rheoli Data'n Electronig : Dogfen Ymgynghori : Llywodraethu a Rheoli Ysgolion : Dyddiad Cyhoeddi: Rhagfyr 2004 : Camau I'w Cymeryd: Ymatebion Erbyn 11 Chwerfor 2005

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