RAMAM, P. K.; VISWANATHAN, T. V. Carbonatite Complex near Borra, Visakhapatnam District Andhra Pradesh. Journal of Geological Society of India, [S. l.], v. 18, n. 11, p. 605–610, 1977. Disponível em: https://geosocindia.com/index.php/jgsi/article/view/64062. Acesso em: 20 sep. 2024.