On the amplitudes of diurnal and semi-diurnal components of geomagnetic variation. MAUSAM, [S. l.], v. 22, n. 2, p. 231–234, 1971. DOI: 10.54302/mausam.v22i2.4625. Disponível em: https://mausamjournal.imd.gov.in/index.php/MAUSAM/article/view/4625. Acesso em: 22 dec. 2025.