Raghad Hamid Hilal, “(Polyacrylamide-Kaolin) Composite Used For Extraction Precious Metals (Au+1, Ag+1) From Electronic Waste Solution by Using Hydrometallurgical Method”, WJES, vol. 7, no. 3, pp. 41–49, Apr. 2020, doi: 10.31185/ejuow.Vol7.Iss3.136.