Tobunluepob, T., Oonkad, K., & Yano, T. (2014). The deficiency of practices and limitation of reaching into good agricultural practices of small holders pig farmers in Chiang Rai province. Veterinary Integrative Sciences, 12(1), 5–17. retrieved from https://he02.tci-thaijo.org/index.php/vis/article/view/146657