Jumpen Onthong และผู้แต่งคนอื่นๆ. (2017) Growth of immature rubber trees planted in abandoned paddy fieldand upland areas in relation to soil properties and leaf nutrients. <i>Songklanakarin Journal of Science and Technology (SJST)</i>, <i>39</i>(5), 675.Jumpen Onthong และผู้แต่งคนอื่นๆ. "Growth of immature rubber trees planted in abandoned paddy fieldand upland areas in relation to soil properties and leaf nutrients". Songklanakarin Journal of Science and Technology (SJST) 39 (2017):675.Jumpen Onthong และผู้แต่งคนอื่นๆ. Growth of immature rubber trees planted in abandoned paddy fieldand upland areas in relation to soil properties and leaf nutrients. Research and Development Office, Prince of Songkla University:ม.ป.ท. 2017.