OBNB doesn't sell books, but you may be able to find a copy at one of these websites:
Bioleg modylol : unedau Bl 1 a Bl 2 : safon UG by Gareth Rowlands. ISBN 1860855016. Published by Uned Iaith Genedlaethol Cymru in 2001. Publication and catalogue information, links to buy online and reader comments.
