Siriwatthanamichai, N., & Kurukodt, J. (2018). The development of organic farming promoting manual for agriculturists of Ban Nongtokpan Tambon Nongtokpan, Amphoe Yang Talat, Kalasin province. International Journal of Agricultural Technology, 14(7), 1921–1930. retrieved from https://li04.tci-thaijo.org/index.php/IJAT/article/view/10264