BHATTACHARYA, J. "Competent Persons” in Small Scale Mining. Journal of Mines, Metals and Fuels, [S. l.], v. 68, n. 5, p. 151–151, 2020. DOI: 10.18311/jmmf/2020/26903. Disponível em: https://informaticsjournals.com/index.php/jmmf/article/view/26903. Acesso em: 28 apr. 2024.