Narumol Ramnut. (2008) Investigation of silica monolith as a non-polar matrix retainer for nitrosamines determination /. Kasetsart University,:ม.ป.ท.Narumol Ramnut. 2008. Investigation of silica monolith as a non-polar matrix retainer for nitrosamines determination /. ม.ป.ท.:Kasetsart University,;Narumol Ramnut. Investigation of silica monolith as a non-polar matrix retainer for nitrosamines determination /. ม.ป.ท.:Kasetsart University, 2008. Print.