Rhaglen gyfoethogi mathemateg. blwyddyn 11 (modwl 3) /
Ifan, Delyth.
University of Exeter.Centre for Innovation in Mathematics Teaching.
National Language Unit of Wales.
Caerdydd : Uned Iaith Genedlaethol Cymru CBAC,
1999.
Addasiad Cymraeg gan = Welsh adaptation by: Delyth Ifan.
Mathematics