KOIVUKANGAS, O. Summary of the Annual Report for 1988 of the Institute of Migration. Migration-Muuttoliike, [S. l.], v. 16, n. 3, p. 31–34, 1989. Disponível em: https://siirtolaisuus-migration.journal.fi/article/view/94630. Acesso em: 3 heinä. 2024.