Nathiang, P. (2019) “[Retracted Article] Development of Rice Seed Dropping Machine for Paddy Field with Local Farmer Participation in Uttaradit Province”, Area Based Development Research Journal. Nakhon Si Thammarat, Thailand, 11(3), pp. 218–233. available at: https://so01.tci-thaijo.org/index.php/abcjournal/article/view/192563 (accessed: 27 April 2025).