Ekalat Tiantubtim. 2001. The efficiency of devised silica gel tube from rice husk ash. Field of Study Industrial Hygiene and Safety, Mahidol University;
Ekalat Tiantubtim. (2001) The efficiency of devised silica gel tube from rice husk ash . Mahidol University/Bangkok.
Ekalat Tiantubtim. The efficiency of devised silica gel tube from rice husk ash. . Bangkok:Mahidol University, 2001.
Ekalat Tiantubtim. (2001) The efficiency of devised silica gel tube from rice husk ash . Mahidol University/Bangkok.