Cybi a Seiriol
By: Gwyneth Wiliam ; y darluniau gan Gaynor Owen.
Contributors: Owen, Gaynor.; Clwyd (Wales). Education Department.
Publisher: Gwasg Gee (ar ran) Awdurdod Addysg Clwyd
Published: 1974
Place of publication: Dinbych (Denbigh)
Language: wel
Number of pages: 41
Subjects: Children's questions and answers.