Allwedd mathemateg 81
By: David Barker ... [et al.] ; [cyfieithwyd gan Ffion E. Kervegant].
Contributors: Baker, David, 1961-; Kervegant, Ffion.
Publisher: Canolfan Astudiaethau Addysg
Published: 2001
Place of publication: Aberystwyth
Language: wel
Number of pages: 369
Subjects: Mathematics -- Study and teaching (Secondary) -- Wales.
Work titles: Key maths 81. Welsh.
Notes: Argraffiad Saesneg gwreiddiol = Original English edition: Cheltenham : Nelson Thornes, 1996.

Addasiad Cymraeg gan = Welsh adaptation by: Ffion E. Kervegant.

Addasiad Cymraeg o = Welsh adaptation of: Key Maths 81.