ใจเตี้ยส., & บุญญประภาพ. (2019). Environmental Impact form Water Quality Problems and Suggestions in Surveillance Activity: A Case Study Li Watershed, Lumphun Province. HCU Journal, 23(1), 32-46. Retrieved from https://he01.tci-thaijo.org/index.php/HCUJOURNAL/article/view/146481