KJELLÉN, Nils. Skuas on the Canadian tundra in 1999: relative occurrence of species, ages and colour phases. Ornis Svecica, Lund, Sweden, v. 10, n. 2, p. 71–78, 2000. DOI: 10.34080/os.v10.22878. Disponível em: https://journals.lub.lu.se/os/article/view/22878. Acesso em: 30 jun. 2024.