Gwledd y bwystfilod
By: ysgrifennwyd a darluniwyd gan Val Biro ; (addaswyd y llyfr hwn i'r Gymraeg gan Dylan Williams).
Contributors: National Language Unit of Wales.
Series: Project Llyfrau Longman
Publisher: Uned Iaith Genedlaethol Cymru CBAC
Published: 1996
Place of publication: Caerdydd
Language: wel
Subjects: Welsh language -- Readers.
Work titles: The monster feast.
Notes: Arg. Saesneg gwreiddiol = Original English ed.: Harlow: Longman Group, 1994.

Addasiad Cymraeg gan = Welsh adaptation by: Dylan Williams.

Addasiad Cymraeg o = Welsh adaptation of: The monster feast.