PARAGUASSÚ-CHAVES, Carlos Alberto et al. Mapping of Nitrate Contamination (NO3-) in an Urban Area on the Brazil/Bolivia Border. International Journal of Advanced Engineering Research and Science, [S. l.], v. 6, n. 4, 2019. Disponível em: https://journal-repository.com/index.php/ijaers/article/view/934.. Acesso em: 9 apr. 2025.