@Book{BDCM20170030492, title = "La radiotelefon\'{\i}a", author = "Alonso Ni\~{n}o, Manuel", publisher = "[S.l. : s.n.", editor = "s.n.", URL = "https://bibliotecavirtualmadrid.comunidad.madrid/bvmadrid_publicacion/es/consulta/registro.do?id=20344", year = "1901", }