KOIVUKANGAS, O. Summary of the Annual Report for 1990 of the Institute of Migration. Migration-Muuttoliike, [S. l.], v. 18, n. 3, p. 26–29, 1991. Disponível em: https://siirtolaisuus-migration.journal.fi/article/view/94438. Acesso em: 23 marras. 2024.