and M.S.Kotb, R.R.Shahin*, Y. A. N. M. M. A. - T.,
"Charge characteristics of clay separates in some soils of Egypt",
3rd Conference on Recent Technologies in Agriculture, Bull. Fac. Agric., Cairo Univ., 2005, (Vol. 2)., Fac. Agric., Cairo Univ., , 2005.
