TY - CPAPER AU - V. M. Ngole AU - G.-I. E. Ekosse TI - LEAD FRACTIONATION IN A SLUDGE-AMENDED MONTMORILLONITIC VERTISOL T2 - 10th International Multidisciplinary Scientific GeoConference SGEM2010 PY - 2010 SP - 165 EP - 172 PB - SGEM Scientific GeoConference ER -