“ANALYSIS OF GRAVITY ON ALTITUDE CHANGES IN GRAVITY MICRO DATA USING POLYNOMIAL EQUATION APPROACH (CASE STUDIES OF MERAPI AND KELUD VOLCANOES)”. Jurnal Teknologi (Sciences & Engineering), vol. 85, no. 3, Apr. 2023, pp. 97-104, https://doi.org/10.11113/jurnalteknologi.v85.19488.