SMP 11-16.
Roberts, Glenys M.(Glenys Mair)
School Mathematics Project.
National Language Unit of Wales.
Caerdydd : Uned Iaith Genedlaethol Cymru,
1997.
Arg. Saesneg gwreiddiol = Original English ed.: Cambridge : Cambridge University Press, 1997.
Addasiad Cymraeg gan = Welsh adaptation by: Glenys M. Roberts.
Mathematics
Mathematics