Argraffiad newydd = New edition: 1994.
Cyhoeddwyd yn wreiddiol = Originally published: [1973?].
OBNB doesn't sell books, but you may be able to find a copy at one of these websites:
Un noson dywyll by T. Llew Jones. ISBN 1859021034. Published by Gwasg Gomer. Publication and catalogue information, links to buy online and reader comments.
