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WikiPedia: Vịt_vàng http://www.sibagu.com/vietnam/anatidae.html http://www.birds.cornell.edu/clementschecklist/dow... http://www.eu-nomen.eu/portal/taxon.php?GUID=urn:l... http://www.itis.gov/servlet/SingleRpt/SingleRpt?se... http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwta... http://vncreatures.net/chitiet.php?page=1&loai=1&I... http://datazone.birdlife.org/species/factsheet/226... http://www.boldsystems.org/index.php/TaxBrowser_Ta... http://www.eol.org/pages/1047357 http://www.eol.org/pages/31429303