1. Alloway, B. J., (1995). Heavy metals in soils. 2nd Ed. Chapman and Hall, Glasgow, 34.
2. Alvarez-Benedi, J.; Munoz-Carpena, R., (2005). Soil, water, solute process characterization. An integrated approach. C.R.C Press, Florida. 538.
3. Amadi, A; Dickson, A. A.; Maate, G. O., (1993). Remediation of oil polluted soils: Effect of organic and inorganic nutrient supplements on the performance of Maize. J. Water Air, Soil Pollut. 66 (1-2), 59–76 (8 pages).
4. Amadi, A.; Bari, Y. U., (1992). Use of poultry manure for the amendment of oil polluted soils in relation to growth of maize. Environ. Int., 18, 521–527 (7 pages).
5. Atuanya, E. J., (1987). Effect of oil pollution on physical and chemical properties of soil: A case study of waste oil contaminated delta soil in Bendel State, Nigeria. J. Appl. Sci., 55, 155–176 (22 pages).