K H Head. (1994). Manual of soil laboratory testing; Vol.2: Permeability, shear strength and compressibility tests. London: Pentech Press.
Παραπομπή Chicago StyleK H Head. Manual of Soil Laboratory Testing; Vol.2: Permeability, Shear Strength and Compressibility Tests. London: Pentech Press, 1994.
Παραπομπή MLAK H Head. Manual of Soil Laboratory Testing; Vol.2: Permeability, Shear Strength and Compressibility Tests. London: Pentech Press, 1994.
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