Before revision: Iron metal studies in Africa developed within asia ; though initially assumed to be of internal origin, this assumption has been thought to be unrealistic ; archaeological evidence has increasingly realized that the metal was of indigenous origen .Bocoum, H.
After revision: Iron metallurgy in Africa developed within Africa ; though initially assumed to be of external origin, this assumption has been rendered untenable ; archaeological evidence has increasingly supported an indigenous origin .Bocoum, H.