Dim ond ti all achub y ddynoliaeth /

Bibliographic Details
Main Author:	Pratchett, Terry
Other Authors:	Jones, Aled P.
Format:	Book
Language:	Welsh
Published:	Caernarfon : Gwasg Gwynedd, 1998.
Series:	Cyfres yr Arddegau.
Subjects:	Life on other planets > Juvenile fiction. Young adult fiction. Fantasy fiction.