Cofnodi data
By: (y fersiwn Cymraeg gan Emyr Ceredig Evans aDafydd Kirkman) ; (dyluniwyd gan Richard Huw Pritchard).
Contributors: Kirkman, Dafydd.; University College of Wales. Centre for Educational Studies.
Series: Pob math o hwyl
Publisher: Canolfan Astudiaethau Addysg
Published: 1995
Place of publication: Aberystwyth
Language: wel
Number of pages: 23
Subjects: Mathematics -- Problems, exercises, etc.; Statistics -- Juvenile literature.