Tilaar, Sandra. “Analysis of Heavy Metal Polution In River Mouths And Estuaries Tondano And Sario IN Manado City North Sulawesi”. Jurnal Ilmiah PLATAX 2, no. 1 (April 24, 2014): 32–39. Accessed May 2, 2024. https://ejournal.unsrat.ac.id/v3/index.php/platax/article/view/4406.