Dim ond ti all achub y ddynoliaeth
By: Terry Pratchett ; addasiad Aled P. Jones.
Contributors: Jones, Aled P.
Series: Cyfres yr Arddegau
Publisher: Gwasg Gwynedd
Published: 1998
Place of publication: Caernarfon
Language: wel
Number of pages: 191
Subjects: Life on other planets -- Juvenile fiction.
Work titles: Only you can save mankind.
Notes: Arg. Saesneg gwreiddiol = Original English ed.: [London]: Doubleday, 1992.

Addasiad Cymraeg gan = Welsh adaptation by: Aled P. Jones.

Addasiad Cymraeg o = Welsh adaptation of: Only you can save mankind.