Ar hyd y flwyddyn.
Contributors: Schools Council.; Cymraeg fel iaith gyntaf yn yr ysgol uwchradd (Project)
Series: Gorwelion
Publisher: [Gwasg y Dref Wen ar ran y Cyngor Ysgolion]
Published: 1981
Place of publication: [Caerdydd]
Language: wel
Number of pages: 127