Pannipa Pawanna. 2011. Remediation of Heavy Metals in wastewater sludge by EDTA extraction. Field of Study Chemistry, Chiang Mai University;
Pannipa Pawanna. (2011) Remediation of Heavy Metals in wastewater sludge by EDTA extraction . Chiang Mai University/Chiang Mai.
Pannipa Pawanna. Remediation of Heavy Metals in wastewater sludge by EDTA extraction. . Chiang Mai:Chiang Mai University, 2011.
Pannipa Pawanna. (2011) Remediation of Heavy Metals in wastewater sludge by EDTA extraction . Chiang Mai University/Chiang Mai.