Jongruk Chanchareonsook, and Hidenori Wada. 1987. “Effects of Filter Cake on Phophate Status in a Submerged Acid Sulfate Soil (Rangsit Soil)”. Agriculture and Natural Resources 21 (3). Bangkok, Thailand:314-17. https://li01.tci-thaijo.org/index.php/anres/article/view/242618.