Arg Saesneg gwreiddiol = Original English ed: Collins Educational/Lincolnshire County Council, 1988.
Yn cynnwys mynegai = Includes index.
Addasiad Cymraeg gan = Welsh adaptation by: Berwyn Prys Jones, Urien Wiliam, Eleri Lovegreen.
Technoleg by P. Fowler. ISBN 0905345517. Published by CBAC mewn cydweithrediad â Chyngor Sir Swydd Lincoln in 1991. Publication and catalogue information, links to buy online and reader comments.