Krutkun, T. (1983) “Toxicity of Arsenic as Sodium Arsenate on Cassava Grown on Map Bon Sandy Loam soil”, Agriculture and Natural Resources. Bangkok, Thailand, 17(2), pp. 34–37. available at: https://li01.tci-thaijo.org/index.php/anres/article/view/240914 (accessed: 18 September 2026).