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12![462 Laridae: skuas, gulls and terns 462 Laridae: skuas, gulls and terns](https://www.pdfsearch.io/img/667ed1196091af63fb1ae0aadc09ab2a.jpg) | Add to Reading ListSource URL: sabap2.adu.org.zaLanguage: English - Date: 2011-10-04 06:31:17
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14![The recent decline in the population of Blackheaded Gulls Larus ridibundus in Denmark and its plausible causes HENNING HELDBJERG The recent decline in the population of Blackheaded Gulls Larus ridibundus in Denmark and its plausible causes HENNING HELDBJERG](https://www.pdfsearch.io/img/7f0af17ae8e9575b61f6cfa6381a67ba.jpg) | Add to Reading ListSource URL: www.dof.dkLanguage: English - Date: 2009-01-26 04:14:24
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15![Population Trends of Gulls and Arctic Terns Nesting in the Belcher Islands, Nunavut Population Trends of Gulls and Arctic Terns Nesting in the Belcher Islands, Nunavut](https://www.pdfsearch.io/img/925259a4c1ac368d7b83a4622fd1577c.jpg) | Add to Reading ListSource URL: pubs.aina.ucalgary.caLanguage: English - Date: 2005-10-14 14:44:13
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16![In a study of the mitochondrial DNA control region and cytochrome-b haplotypes of the large white-headed gull complex, Crochet et al In a study of the mitochondrial DNA control region and cytochrome-b haplotypes of the large white-headed gull complex, Crochet et al](https://www.pdfsearch.io/img/c0357cc15e13e2145d250ce27209688d.jpg) | Add to Reading ListSource URL: www.aou.orgLanguage: English - Date: 2008-08-15 11:14:08
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