Somphob Jongruaysup และ Vidhaya Trelo-ges. (2005) Physical Soil Properties Changes of Saraburi Soil Series under Rice Cultivation. <i>Thai Agricultural Research Journal</i>, <i>23</i>(1), 30-43.Somphob Jongruaysup และ Vidhaya Trelo-ges. "Physical Soil Properties Changes of Saraburi Soil Series under Rice Cultivation". Thai Agricultural Research Journal 23 (2005):30-43.Somphob Jongruaysup และ Vidhaya Trelo-ges. Physical Soil Properties Changes of Saraburi Soil Series under Rice Cultivation. Department of Agriculture:ม.ป.ท. 2005.