Comparison of vane-shear relationship and fall-cone strength values for two clay soils (part reproduction of figure 7 presented in the paper by Wasti and Bezirci (1986)): (a) sample number 6 (w_L(cup) = 52%, w_P = 22%); (b) sample number 19 (w_L(cup) = 196%, w_P = 23%)