Kongpanna, Wirat, Nareerut Seerasarn, and Bumpen Keowan. 2025. “Factors Affecting Farmer’s Extension Needs of Maize Production for Farmers in Nakhonthai District, Phitsanulok Province”. Research and Development Journal, Loei Rajabhat University 20 (71):78-86. https://so05.tci-thaijo.org/index.php/researchjournal-lru/article/view/275673.