VENUGOPAL, V. R. . Sunrise effect in the region of the lonosphere over Kodaikanal. MAUSAM, [S. l.], v. 10, n. 3, p. 325–330, 1959. DOI: 10.54302/mausam.v10i3.4067. Disponível em: https://mausamjournal.imd.gov.in/index.php/MAUSAM/article/view/4067. Acesso em: 12 nov. 2025.