“IDENTIFYING SHALLOW SUBSURFACE CHARACTERISTICS VIA COMPRESSIONAL TO SHEAR WAVES VELOCITY RATIO (VP VS) FROM SEISMIC REFRACTION TOMOGRAPHY”. Jurnal Teknologi (Sciences & Engineering), vol. 83, no. 1, Dec. 2020, pp. 67-73, https://doi.org/10.11113/jurnalteknologi.v83.14990.