18:03Galwad Eto20/12/2011BBC Radio Cymru Duration: 27 o funudau Tue 20th Dec 2011, 18:03 on BBC Radio CymruCyfle i glywed rhai o bigion 'Galwad Cynnar' eto. Highlights from Galwad Cynnar.GenresFactualScience & NatureBrandGalwad Eto Source: BBC Online