Chuleemas Boonthai. (1994) Toxicity and residual effects of Azadirachta indica var. siamensis extract and cyhalothrin on Apis florea and Apis cerana. Chulalongkorn University,:ม.ป.ท.Chuleemas Boonthai. 1994. Toxicity and residual effects of Azadirachta indica var. siamensis extract and cyhalothrin on Apis florea and Apis cerana. ม.ป.ท.:Chulalongkorn University,;Chuleemas Boonthai. Toxicity and residual effects of Azadirachta indica var. siamensis extract and cyhalothrin on Apis florea and Apis cerana. ม.ป.ท.:Chulalongkorn University, 1994. Print.