Wilaiwan Utoomprukporn. 1987. Multichanel filtration system fortrace metal analysis in water. Bangkok:Chulalongkorn University;
Wilaiwan Utoomprukporn. (1987) Multichanel filtration system fortrace metal analysis in water (รายงานผลงานวิจัย). Chulalongkorn University:Bangkok.
Wilaiwan Utoomprukporn. Multichanel filtration system fortrace metal analysis in water. Bangkok:Chulalongkorn University, 1987.
Wilaiwan Utoomprukporn. (1987) Multichanel filtration system fortrace metal analysis in water (รายงานผลงานวิจัย). Chulalongkorn University:Bangkok.