ANALYSIS OF GRAVITY ON ALTITUDE CHANGES IN GRAVITY MICRO DATA USING POLYNOMIAL EQUATION APPROACH (CASE STUDIES OF MERAPI AND KELUD VOLCANOES). J. Teknol. [Internet]. 2023 Apr. 19 [cited 2026 Sep. 13];85(3):97-104. Available from: https://journals.utm.my/jurnalteknologi/article/view/19488