Patchara Wonprasaid และ Wittaya Apai; Sodchol Wonprasaid. (2009) The Sulfur Dioxide Residues in Fresh Longan at Different Periods after Fumigation. <i>Thai Agricultural Research Journal</i>, <i>27</i>(1), 26-26.Patchara Wonprasaid และ Wittaya Apai; Sodchol Wonprasaid. "The Sulfur Dioxide Residues in Fresh Longan at Different Periods after Fumigation". Thai Agricultural Research Journal 27 (2009):26-26.Patchara Wonprasaid และ Wittaya Apai; Sodchol Wonprasaid. The Sulfur Dioxide Residues in Fresh Longan at Different Periods after Fumigation. Department of Agriculture:ม.ป.ท. 2009.