Anggono, Titi, and Syuhada Syuhada. 2017. “SUBSURFACE VELOCITY MODEL FROM INVERSION OF H/V SPECTRAL RATIO OF AMBIENT NOISE RECORDS”. Spektra: Jurnal Fisika Dan Aplikasinya 2 (1), 45 - 52. https://doi.org/10.21009/SPEKTRA.021.07.