Boonpradub, Somchai. 1990. “Elefect of the Pre-Emergence Herbicide Metolachlor on the Growth and Yield of Blacktgram (Vigna mungo L.)”. Thai Agricultural Research Journal 8 (1):22-28. https://li01.tci-thaijo.org/index.php/thaiagriculturalresearch/article/view/242403.