Nguimbous-Kouoh, Jean Jacques, Elisabeth Ngo Bum, and Simon Ngos. “GRAVITY FIELD: THEORETICAL AND EXPERIMENTAL CONTRIBUTION TO STUDY WEIGHING PENDULUM PERIOD”. JOURNAL OF ADVANCES IN PHYSICS 9, no. 3 (July 4, 2015): 2440–2445. Accessed May 19, 2024. https://rajpub.com/index.php/jap/article/view/1348.