The very long lived M-Regions near the Sunspot Minimum of 1933. MAUSAM, [S. l.], v. 6, n. 3, p. 251–253, 1955. DOI: 10.54302/mausam.v6i3.4482. Disponível em: https://mausamjournal.imd.gov.in/index.php/MAUSAM/article/view/4482. Acesso em: 29 dec. 2025.