Phittayouth Pratoomrat และ Parkorn Suwanich. (2012) Study of oyster shell in the removal of lead form synthetic wastewater. Mahidol University:ม.ป.ท.Phittayouth Pratoomrat และ Parkorn Suwanich. 2012. Study of oyster shell in the removal of lead form synthetic wastewater. ม.ป.ท.:Mahidol University;Phittayouth Pratoomrat และ Parkorn Suwanich. Study of oyster shell in the removal of lead form synthetic wastewater. ม.ป.ท.:Mahidol University, 2012. Print.