1. Vertisols in the semi-arid region of Sudan;Abdulla,1989
2. Chemical properties of some Vertisols of Ghana;Acquaye,1989
3. Micromorphology and mineralogy of cracking soils from the Accra Plains of Ghana;Acquaye;Soil Sci. Soc. Amer. J.,1992
4. Vertisols;Ahmad,1983
5. Acid Vertisols;Ahmad,1985