Sithipong S, Koontragool B. Local gravity measurement by using the minimized period of rod pendulums. NKRAFA J.Sci Technol. [internet]. 2024 Oct. 10 [cited 2026 Sep. 13];20(2):44-5. available from: https://ph02.tci-thaijo.org/index.php/nkrafa-sct/article/view/252331