Pongsak Nuphan. 1992. Treatment of jeans bleaching factory wastewater for removal of colour, COD and manganese by ferrous sulphate, ferric sulphate in conjunction with polymer coagulant aids. Graduate School, Kasetsart University;
Pongsak Nuphan. (1992) Treatment of jeans bleaching factory wastewater for removal of colour, COD and manganese by ferrous sulphate, ferric sulphate in conjunction with polymer coagulant aids . Kasetsart University/Bangkok.
Pongsak Nuphan. Treatment of jeans bleaching factory wastewater for removal of colour, COD and manganese by ferrous sulphate, ferric sulphate in conjunction with polymer coagulant aids. . Bangkok:Kasetsart University, 1992.
Pongsak Nuphan. (1992) Treatment of jeans bleaching factory wastewater for removal of colour, COD and manganese by ferrous sulphate, ferric sulphate in conjunction with polymer coagulant aids . Kasetsart University/Bangkok.