Pintip Kaewkamthong และ Sanya Sirivithayapakorn. (2010) Removal of heavy metals from wastewater by egg shell membrane. Kasetsart University,:ม.ป.ท.Pintip Kaewkamthong และ Sanya Sirivithayapakorn. 2010. Removal of heavy metals from wastewater by egg shell membrane. ม.ป.ท.:Kasetsart University,;Pintip Kaewkamthong และ Sanya Sirivithayapakorn. Removal of heavy metals from wastewater by egg shell membrane. ม.ป.ท.:Kasetsart University, 2010. Print.