Yr haul
By: (cynhyrchwyd gan M. Williams ar ran tîm project y Cyngor Ysgolion ; cyfarwyddwr y project Merfyn Griffiths ; dirprwy gyfarwyddwr G. Wyn Owens ; eglurebau gan David Brown).
Contributors: Williams, M. 1948-; Griffiths, Merfyn.; Owens, G. Wyn.; Brown, David.
Series: Holi ac arbrofi
Publisher: Hodder and Stoughton (ar ran) Cyngor Ysgolion
Published: 1975
Place of publication: London
Language: wel
Number of pages: 18
Subjects: Sun -- Juvenile literature.