Yr argyfwng mawr olaf
By: Betsy Byars ; addasiad Meinir Pierce Jones.
Series: Cyfres Cled
Publisher: Gwasg Taf
Published: 1995
Place of publication: Bodedern
Language: wel
Number of pages: 125
Work titles: 18th emergency.
Notes: Cyhoeddwyd yn wreiddiol = Originally published: New York : VikingPress, 1973.

Addasiad Cymraeg o = Welsh adaptation of: The 18th emergency.