Ed Sarobol, and Vichan Vichukit. “Genetic Contributions of Thai Soybean Cultivars to Annual Yield Increases”. Agriculture and Natural Resources 25, no. 2 (June 30, 1991): 127–132. accessed September 18, 2026. https://li01.tci-thaijo.org/index.php/anres/article/view/241957.