Nathiang, Pairote. “[Retracted Article] : Development of Rice Seed Dropping Machine for Paddy Field With Local Farmer Participation in Uttaradit Province [Area Based Development Research Journal, (2019), 11(3), 218-233] (in Thai)”. Area Based Development Research Journal 12, no. 2 (April 17, 2020): 158. Accessed April 25, 2024. https://so01.tci-thaijo.org/index.php/abcjournal/article/view/241200.