Germishuys R, Diamond R. Nitrogen isotopes of Eichhornia crassipes (water hyacinth) confirm sewage as leading source of pollution in Hartbeespoort Reservoir, South Africa. S. Afr. J. Sci. [Internet]. 2022 Jul. 28 [cited 2024 Nov. 21];118(7/8). Available from: https://sajs.co.za/article/view/11098