Cyhoeddwyd y fersiwn Saesneg yn wreiddiol = Originally published in English: London: A. & C. Black, 2008.
'Adnoddau addysgu Mathemateg y gellir eu haddasu, caniateir llungopïo' - clawr = cover.
Ffeithiau rhif a chyfrifiadau. Blwyddyn 4 by Hilary Koll. ISBN 9781845213824. Published by CAA in 2010. Publication and catalogue information, links to buy online and reader comments.