Teitl clawr = Cover title.
Defnyddio cronfa ddata. Uned 4, Cyfathrebu a thrin gwybodaeth : uned o waith sy'n cefnogi dysgu, addysgu ac asesu disgyblion wrth iddynt drin data. ISBN 1861124279. Published by Awdurdod Cymwysterau, Cwricwlwm ac Asesu Cymru in 2002. Publication and catalogue information, links to buy online and reader comments.