Jongruk Cahnchareonsook, Pattama Sangborisut, and Sorasith Vacharotayan, “Utilization of Waste Materials from Monosodium Glutamate Factory as Source of Nitrogen for Paddy in Acid Sulfate Soil”, Agr. Nat. Resour., vol. 23, no. 1, pp. 93–97, Mar. 1989.