First record of black-headed gull Larus ridibundus and third record of herring gull Larus argentatus for South America
Fisher, David J.
Article
1978
Bulletin of the British Ornithologists' Club
98
113--113
BioStor
London, British Ornithologists' Club, 1893-
BioStor: https://biostor.org/reference/112666
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