Estimate of Small Stiffness and Damping Ratio in Residual Soil Using Spectral Analysis of Surface Wave MethodNor Faizah Bawadi, Khairul Anuar Mohd Nayan, Mohd Raihan Taha and Noor Adila OmarMATEC Web of Conferences, 47 (2016) 03017DOI: https://doi.org/10.1051/matecconf/20164703017