Dwr.
Contributors: Gwynedd (Wales). Education Department.
Series: Project Treftadaeth a Diwylliant Awdurdod Addysg Gwynedd gyda chefnogaeth y Swyddfa Gymreig
Publisher: [Awdurdod Addysg Gwynedd]
Place of publication: [Caernarfon]
Language: wel
Number of pages: 36