LANDGREN, Thomas. Re-distribution of Black-headed Gull Larus ridibundus colonies in NE Vänern during 1985—1995. Ornis Svecica, Lund, Sweden, v. 6, n. 1–2, p. 45–56, 1996. DOI: 10.34080/os.v6.22994. Disponível em: https://journals.lub.lu.se/os/article/view/22994. Acesso em: 26 apr. 2024.