Haque, Inam-ul-, Asim Khan, and Sheraz Anwar. “Regeneration of Spent Chromium Solutions”. Biological Sciences - PJSIR 50, no. 5 (October 9, 2007): 304–307. Accessed November 22, 2024. https://v2.pjsir.org/index.php/biological-sciences/article/view/1018.