Chansungnoen, Tawatchai, Pisitpong Pantong, Thatsaphon Chatkoh, and Wasin Ritthison. “Development of a Short-Text Alarm Water Level Meter for Small Reservoirs With Ultrasonic Sensors”. Journal of Vongchavalitkul university 33, no. 2 (December 28, 2020): 71–77. Accessed April 25, 2024. https://ph01.tci-thaijo.org/index.php/vujournal/article/view/243744.