Sunsitthisawad, Warangkana, and Somsak Pitaksanurat. “Contamination of Coliform Bacteria in Rural Households Drinking Water”. Asia-Pacific Journal of Science and Technology 16, no. 8 (April 19, 2017): 1025–1035. Accessed May 19, 2024. https://so01.tci-thaijo.org/index.php/APST/article/view/83629.