Nitaya Niumpang. 2006. Influence of anaerobic digestion on Ascaris suum and heavy metals in wastewater sludge. Field of Study Environmental Sanitation, Mahidol University;
Nitaya Niumpang. (2006) Influence of anaerobic digestion on Ascaris suum and heavy metals in wastewater sludge . Mahidol University/Bangkok.
Nitaya Niumpang. Influence of anaerobic digestion on Ascaris suum and heavy metals in wastewater sludge. . Bangkok:Mahidol University, 2006.
Nitaya Niumpang. (2006) Influence of anaerobic digestion on Ascaris suum and heavy metals in wastewater sludge . Mahidol University/Bangkok.