Teitl clawr = Title cover.
Argraffiad Saesneg gwreiddiol = Original English edition : Oxford : Oxford University Press, 1993.
Addasiad Cymraeg gan = Welsh adaptation by : Emily Huws.
Antur dan y ddaear by Roderick Hunt. ISBN 0861741609. Published by Gwasg Addysgol Drake in 1999. Publication and catalogue information, links to buy online and reader comments.