I. K. Addai and O. Safo-Kantanka
International Journal of Botany 2 ( 2 ): 152 - 155 , 2006
T. B. Bayorbor, I. K. Addai, I. Y.D. Lawson, W. Dogbe and D. Djabletey
Journal of Agronomy 5 ( 1 ): 137 - 141 , 2006