V. Korpraditskul, S. Jiwajinda, R. Korpraditskul, S. Wicharn, and C. Ratanagreetakul. 1988. “Side Effect of three Herbicides on Soil Microorganism”. Agriculture and Natural Resources 22 (5). Bangkok, Thailand:54-66. https://li01.tci-thaijo.org/index.php/anres/article/view/242566.