Arg. Saesneg gwreiddiol = Original English ed.: Cheltenham, Stanley Thornes, 1981.
Addasiad Cymraeg gan = Welsh adaptation by: Dafydd Kirkman.
Priodweddau thermol mater by Roger Muncaster. ISBN 1856443132. Published by Canolfan Astudiaethau Addysg in 1996. Publication and catalogue information, links to buy online and reader comments.