The corporate concentration in the South European mass communication technology: : the Spanish radiotelegraphy. TST. Transportes, Servicios y Telecomunicaciones, [S. l.], n. 53, p. 15–52, 2024. Disponível em: https://revistas.uva.es/index.php/tst/article/view/7981. Acesso em: 17 jan. 2026.