Nathiang P. [Retracted Article] : Development of rice seed dropping machine for paddy field with local farmer participation in Uttaradit province [Area Based Development Research Journal,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 Dev. Res. J. [Internet]. 2020 Apr. 17 [cited 2024 Apr. 20];12(2):158. Available from: https://so01.tci-thaijo.org/index.php/abcjournal/article/view/241200