Nivat Nabheerong และ Pitsanu Hintang; Monton Poonyarit. (2005) Japonica Rice Yield Trials in Farmersโ Field of the Lower Northern Part of Thailand. <i>Thai Agricultural Research Journal</i>, <i>23</i>(3), 228-240.Nivat Nabheerong และ Pitsanu Hintang; Monton Poonyarit. "Japonica Rice Yield Trials in Farmersโ Field of the Lower Northern Part of Thailand". Thai Agricultural Research Journal 23 (2005):228-240.Nivat Nabheerong และ Pitsanu Hintang; Monton Poonyarit. Japonica Rice Yield Trials in Farmersโ Field of the Lower Northern Part of Thailand. Department of Agriculture:ม.ป.ท. 2005.