Harri Parri - ci gwaetha'r byd
By: gan Sheila Lavelle ; darluniwyd gan John Ireland ; (addaswyd y llyfr hwn i'r Gymraeg gan Eleri Rogers).
Contributors: Ireland, John.; Rogers, Eleri.; National Language Unit of Wales.
Series: Project Llyfrau Longman
Publisher: Uned Iaith Genedlaethol Cymru CBAC
Published: 1996
Place of publication: Caerdydd
Language: wel
Number of pages: 24
Subjects: Welsh language -- Readers.
Work titles: Webster the world's worst dog.
Notes: Arg. Saesneg gwreiddiol = Original English ed.: Harlow: Longman Group, 1994.

Addasiad Cymraeg gan = Welsh adaptation by: Eleri Rogers.

Addasiad Cymraeg o = Welsh adaptation of: Webster the world's worst dog.