Revival of ancient Ujjain Observatory. MAUSAM, [S. l.], v. 1, n. 2, p. 149–149, 1950. DOI: 10.54302/mausam.v1i2.4487. Disponível em: https://mausamjournal.imd.gov.in/index.php/MAUSAM/article/view/4487. Acesso em: 29 dec. 2025.