SÖDERHOLM, Svante. Sex ratio of the Eurasian Wigeon Anas penelope during spring migration at Angarnsjöängen, Uppland, 1995—2005. Ornis Svecica, Lund, Sweden, v. 17, n. 3–4, p. 113–120, 2007. DOI: 10.34080/os.v17.22682. Disponível em: https://journals.lub.lu.se/os/article/view/22682. Acesso em: 20 jul. 2024.