Yn cynnwys mynegai = Includes index.
Cyfiethiwyd i'r Gymraeg gan = Translated into Welsh by: Lynwen Rees Jones.
Cemeg safon uwch by J. A. Hunt. ISBN 1856448827. Published by Canolfan Astudiaethau Addysg in 2006. Publication and catalogue information, links to buy online and reader comments.