GUPTA, P. C. Maximum permissible level of radio activity in drinking water. Defence Science Journal, [S. l.], v. 10, n. 4, p. 337–343, 2014. DOI: 10.14429/dsj.10.7675. Disponível em: https://publications.drdo.gov.in/ojs/index.php/dsj/article/view/7675. Acesso em: 16 jun. 2025.