GERMISHUYS, Ryno; DIAMOND, Roger. Nitrogen isotopes of Eichhornia crassipes (water hyacinth) confirm sewage as leading source of pollution in Hartbeespoort Reservoir, South Africa. South African Journal of Science, [S. l.], v. 118, n. 7/8, 2022. DOI: 10.17159/sajs.2022/11098. Disponível em: https://sajs.co.za/article/view/11098. Acesso em: 16 apr. 2024.