เหมทานนท์ ส. (2017). The Study of Appropriate Water Supply Quality for Consumption in Tambon La-Ai, Amphor Chawang, Nakhon Si Thammarat Province. Wichcha Journal Nakhon Si Thammarat Rajabhat University, 36(1), 98–111. retrieved from https://li01.tci-thaijo.org/index.php/wichcha/article/view/105533