OBNB doesn't sell books, but you may be able to find a copy at one of these websites:
Deuteronomium a Datguddiad : cydymaith i faes llafur yr oedolion, 2002-2003 by John Rice Rowlands. ISBN 1859944469. Published by Cyhoeddiadau'r Gair in 2002. Publication and catalogue information, links to buy online and reader comments.
