Nalinee Wachiranugul. (2007) Potential impacts of heavy metals from the paper sludge-derived flowerpot. Mahidol University,:ม.ป.ท.Nalinee Wachiranugul. 2007. Potential impacts of heavy metals from the paper sludge-derived flowerpot. ม.ป.ท.:Mahidol University,;Nalinee Wachiranugul. Potential impacts of heavy metals from the paper sludge-derived flowerpot. ม.ป.ท.:Mahidol University, 2007. Print.