KOIVUKANGAS, O. Summary of the Annual Report for 1989 of the Institute of Migration. Migration-Muuttoliike, [S. l.], v. 17, n. 2, p. 27–30, 1990. Disponível em: https://siirtolaisuus-migration.journal.fi/article/view/94536. Acesso em: 18 touko. 2024.