Ketwong, Chatyapha, Trisupakitti, Somsuk, Nausri, Chompoo, AND Senajuk, Watchara. " Removal of Heavy Metal from Synthetic WastewaterUsing Calcined Golden Apple Snail Shells" Naresuan University Journal: Science and Technology (NUJST) [Online], Volume 26 Number 4 (15 November 2018)