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hbw.com
Van Gils, J.; Wiersma, P.; Kirwan, G. M. (2017). del Hoyo, Josep; Elliott, Andrew; Sargatal, Jordi; Christie, David A.; de Juana, Eduardo (eds.). "Surfbird (Calidris virgata)". Handbook of the Birds of the World Alive. Barcelona, Spain: Lynx Edicions. Retrieved 23 July 2017.