Ghazi, A., Hafezi Moghadas, N., Sadeghi, H., Ghafoori, M. and Lashkaripur, G. R. (2015) “Empirical relationships of shear wave velocity, SPT-N value and vertical effective stress for different soils in Mashhad, Iran”, Annals of Geophysics, 58(3), p. S0325. doi: 10.4401/ag-6635.