ELLEGREN, Hans; WALLIN, Kjell. Autumn migrating Bluethroats Luscinia s. svecica orient in an eastsoutheasterly direction at Gävle, East Sweden. Ornis Svecica, Lund, Sweden, v. 1, n. 1, p. 47–50, 1991. DOI: 10.34080/os.v1.23095. Disponível em: https://journals.lub.lu.se/os/article/view/23095. Acesso em: 26 apr. 2024.