BRARGAVA, B.; YACOB , A.; RAO, D. A filter analysis of Magnetic Activity Index Ap for 1932-33 and 1952-53. MAUSAM, [S. l.], v. 19, n. 3, 1968. DOI: 10.54302/mausam.v19i3.5677. Disponível em: http://103.215.208.102/index.php/MAUSAM/article/view/5677. Acesso em: 19 sep. 2024.