Kongpanna, Wirat, Nareerut Seerasarn, and Bumpen Keowan. “Factors Affecting Farmer’s Extension Needs of Maize Production for Farmers in Nakhonthai District, Phitsanulok Province”. Research and Development Journal, Loei Rajabhat University 20, no. 71 (April 2, 2025): 78–86. accessed April 26, 2025. https://so05.tci-thaijo.org/index.php/researchjournal-lru/article/view/275673.