Vangnai, Somsak, and Thongchai Mala. 1998. “Effects of Organic and Chemical Fertilizers on Growth and Yield of Mungbean Line Kamphaengsaen 1 Cultivated in Kamphaengsaen Soil Series”. Agriculture and Natural Resources 32 (3). Bangkok, Thailand:275-84. https://li01.tci-thaijo.org/index.php/anres/article/view/240576.