Sirilak Kaewsuralikhit และ Praphai Thongra-ar. (2011) Utilization of Neem Extracted Substance, Bt and Entomopathogenic Nematode on Azolla?s lnsect Pest Control. <i>Thai Agricultural Research Journal</i>, <i>29</i>(3), 262-274.Sirilak Kaewsuralikhit และ Praphai Thongra-ar. "Utilization of Neem Extracted Substance, Bt and Entomopathogenic Nematode on Azolla?s lnsect Pest Control". Thai Agricultural Research Journal 29 (2011):262-274.Sirilak Kaewsuralikhit และ Praphai Thongra-ar. Utilization of Neem Extracted Substance, Bt and Entomopathogenic Nematode on Azolla?s lnsect Pest Control. Department of Agriculture:ม.ป.ท. 2011.