Thianchai Arayangkoon, Preecha Wadisirisuk, Wiroj Wajananawat, and Witaya Thananusont. “Study on Rhizobium Behaviors in Low Moisture Content of Upland Soil”. Agriculture and Natural Resources 26, no. 3 (September 30, 1992): 257–262. accessed September 17, 2026. https://li01.tci-thaijo.org/index.php/anres/article/view/241783.