Sgwrs:Ffosfforws
spelling? "Yr Athro Deri Tomos yn trafod Phosphorus." https://www.bbc.co.uk/sounds/play/p0505g4k Irtapil (sgwrs) 16:20, 14 Ionawr 2020 (UTC)
spelling? "Yr Athro Deri Tomos yn trafod Phosphorus." https://www.bbc.co.uk/sounds/play/p0505g4k Irtapil (sgwrs) 16:20, 14 Ionawr 2020 (UTC)[ateb]