Nutpornnapat Sinthusith และ Pongsak Noophan. (2014) Identifiction and quantification of bacteria and archaea responsible for ammonia oxidation in different activated sludege system. Kasetsart University:ม.ป.ท.Nutpornnapat Sinthusith และ Pongsak Noophan. 2014. Identifiction and quantification of bacteria and archaea responsible for ammonia oxidation in different activated sludege system. ม.ป.ท.:Kasetsart University;Nutpornnapat Sinthusith และ Pongsak Noophan. Identifiction and quantification of bacteria and archaea responsible for ammonia oxidation in different activated sludege system. ม.ป.ท.:Kasetsart University, 2014. Print.