P1073 Testun Cymraeg/Saesneg tête-bêche = Welsh/English text tête-bêche.
Buy a copy
OBNB doesn't sell books, but you may be able to find a copy at one of these websites:
Saving our language = Achub ein hiaith by Ken Hopkins. ISBN 1904773109. Published by Institute of Welsh Affairs in 2006. Publication and catalogue information, links to buy online and reader comments.