Cover image not available
Arg. Saesneg gwreiddiol = Original English ed.: Cambridge: Cambridge University Press, 1992.
Addasiad Cymraeg gan = Welsh adaptation by; Meinir Evans.
Cyhoeddwyd dan nawdd Cynllun Adnoddau Cyd-bwyllgor Addysg Cymru = Published under the auspices of the Welsh Joint Education Committee Resources Project.
Teitl clawr = Cover title.
OBNB doesn't sell books, but you may be able to find a copy at one of these websites:
Gorwelion : gwyddoniaeth. ISBN 1860851088. Published by Uned Iaith Genedlaethol Cymru CBAC in 1996. Publication and catalogue information, links to buy online and reader comments.