P1073 Testun Cymraeg/Saesneg tête-bêche = Welsh/English text tête-bêche.
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Gwerthfawrogi ein dŵr croyw : pwysigrwydd ein hafonydd, llynnoedd a gwlyptiroedd. Published by Cyswllt Amgylchedd Cymru in 2013. Publication and catalogue information, links to buy online and reader comments.