Pamungkas, Inggia, Yuli Andriani, Junianto ., and Iskandar . “Lemna Sp. As a Chromium Heavy Metal Phytoremediator on Tannery Wastewater and Its Potential Use As Fish Feed”. Asian Plant Research Journal 3, no. 1 (September 7, 2019): 1-7. Accessed October 22, 2019. http://journalaprj.com/index.php/APRJ/article/view/30057.