Rety Habsari, I. et al. 2025. Subsurface Analysis of National Road Bts. Sidoarjo City –Gempol UsingGeophisycs Method and Geotechnical Tests. Journal of Infrastructure & Facility Asset Management. 5, 2 (Jul. 2025), 65–74. DOI:https://doi.org/10.12962/jifam.v5i2.7675 .