Varecha, P., Fadllan, A., & Hartono, H.
(2022).
Soil Classification Using Horizontal to Vertical Spectrum Ratio Methods on Scilab in Sendangmulyo, Semarang.
Physics Education Research Journal, 4(2), 71-78.
doi:
https://doi.org/10.21580/perj.2022.4.2.12542