1. Allen, J. B. and Braud, H. J. Jr., Effect of cracks and initial moisture content on the infiltration rate of Sharky clay. Bull. La. Agr. Exp. St. 613 pp. 27 (1966).
2. ASTM, D 423–66; D 424–59; D 427–61.
3. Avnimelech, Y., Shaham, V. and Feder, A., Elution of potassium in soil. Soil Sci. Soc. Am. Proc. 34, 408–411 (1970).
4. Ben-Shlom, A., Laboratory method for measuring swelling potential under partial saturation conditions. M. Sc. Thesis, Civil Eng. Technion, Haifa Israel (1970).
5. Chapman, H. D., Methods of Soil Analysis. Part 2. Ch. 57, C. A. Black ed. (1965).