Sepron y neidr fôr
By: gan Adam Blade ; addasiad Tudur Dylan Jones
Contributors: Jones, Tudur Dylan
Series: Byd y bwystfilod -- . 2; Byd y bwystfilod -- . 2.; Beast quest -- bk. 2.
Publisher: Rily
Published: 2011
Place of publication: Hengoed
Language: wel
Number of pages: 112
ISBN-13: 9781904357551
Subjects: Monsters; Juvenile fiction; Sea monsters
Work titles: Sepron the sea serpent
Notes: Cyhoeddwyd yn wreiddiol yn Saesneg = Originally published in English: London : Orchard Books, 2007.

Addasiad Cymraeg o = Welsh adaptation of: 'Sepron the sea serpent'.