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'Noddwyd gan y Gronfa Ewropeaidd am Gyfarwyddyd a Gwarant Amaethyddol' - nodyn o'r tudalen deitl = 'Sponsored by the European Agriculture Guidance and Guarantee Fund' - note from title page.
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Grugiar ddu. Published by RSPB in 1996. Publication and catalogue information, links to buy online and reader comments.