Berti Barfddu yn achub yr ysgol
By: addasiad Cymraeg gan Emily Huws ; lluniau gan Doffy Weir.
Contributors: Huws, Emily.
Series: Coeden ddarllen Rhydychen -- Cam 10; Brig y goeden
Publisher: Gwasg Addysgol Drake; Drake Educational Associates Ltd
Published: 2001
Place of publication: Caerdydd
Language: wel
Number of pages: 31
Work titles: Blackbones saves the school.