MURTHY, M. V. N. National Earth Sciences Data Centre in G. S. I. Journal of Information and Knowledge, [S. l.], v. 15, n. 1, p. 19–23, 1978. DOI: 10.17821/srels/1978/v15i1/50535. Disponível em: https://srels.org/index.php/sjim/article/view/50535. Acesso em: 8 jan. 2025.