Simbolon, B., M. Delina, and B. Heryanto. 2016. “KALIBRASI SEISMOMETER BBVS-120:G05402VS DENGAN METODE KOMPARASI”. PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) 5 (October), SNF2016-CIP. https://doi.org/10.21009/0305020122.