Ditamapai, Jiradaj, Nikorn" Sirivongpaisal, and Sakesun Suthummanonsal. “A Study of Physical Distribution Model in Suratthani Province”. Engineering and Applied Science Research 38, no. 2 (May 22, 2012): 129–137. accessed August 31, 2026. https://ph01.tci-thaijo.org/index.php/easr/article/view/1602.