Mongkol Kwangwaropas (1990) “Effects of Using a Portable Rotary Rice Weeder on Yield in the North Eastern Regions’ Rice Transplanting Field”, Agriculture and Natural Resources. Bangkok, Thailand, 24(4), pp. 479–486. available at: https://li01.tci-thaijo.org/index.php/anres/article/view/242240 (accessed: 29 August 2026).