Kaewlamun, W., Nitiwararuk, K., Khunmanee, S., & Tantasuparak, W. (2018). Improving Marketing Outlets for Baan Thung-Khaam Pig Farms, Nan Province. Area Based Development Research Journal, 10(6), 453–470. Retrieved from https://so01.tci-thaijo.org/index.php/abcjournal/article/view/156181