MOORHEAD, S. Radio Telephone Surveying - The Traditional Way. Journal of Telecommunications and the Digital Economy, [S. l.], v. 4, n. 1, p. 15–35, 2016. DOI: 10.18080/jtde.v4n1.47. Disponível em: https://mail.jtde.telsoc.org/index.php/jtde/article/view/47. Acesso em: 6 jul. 2024.