P1073 Fersiwn Saesneg hefyd ar gael = English version also available: Assessing land-use scenarios to improve groundwater quality: a Slea catchment study.
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Asesu senarios defnyddio tir er mwyn gwella ansawdd dŵr daear : astudiaeth dalgylch Slea. Published by Environment Agency in 2006. Publication and catalogue information, links to buy online and reader comments.