Saenthong, N. (2015) “Effects of size of drain valves on flow rate of the hydraulic ram pump using for agriculture”, SNRU Journal of Science and Technology, 7(2), pp. 106–113. Available at: https://ph01.tci-thaijo.org/index.php/snru_journal/article/view/43662 (Accessed: 29 January 2022).