“… From Braude and Foot, 1942;Schneider, 1947; Haines and Echeveria, 1955;Morrison, 1957;Dittmar, 1958;Evans, 1960;Bateman and Fresnillo, 1967;Oyenuga, 1968;Devendra and Gohl, 1970;Owusu-Domfeh et al, 1970;Ashun, 1973;Wong and Abu Hassan, 1988;Falaye, 1990; Abiola and Tewe, 1991;Donkoh et al, 1991;Fleischer et al, 1991;Fagbenro, 1995;Aregheore, 2002 14 From Crowther, 1936Knapp and Churchman, 1937;Black and Barron, 1943;Schneider, 1947;Pearman et al, 1951;Morrison, 1957;Evans, 1960;Bonadonna et al, 1963;Oyenuga, 1968; Owusu-Domfe et al, 1970; Abiola and Tewe, 1991; Aregheore, 2002 15 From Braude andFoot, 1942;Schneider, 1947;Pearman et al, 1951;Morrison, 1957;Evans, 1960;Velloso et al, 1965;Oyenuga, 1968;Fagbenro, 1988;Flachowsky et al, 1990;Offem, 1990;Odunsi and Longe, 1995a;Odunsi et al, 1999 …”