Bosso N A, van der Waaij E H, Agyemang K and van Arendonk J A M 2009: Genetic parameters for growth traits in N’Dama cattle under tsetse challenge in the Gambia. Livestock Research for Rural Development. Volume 21, Article #33. Retrieved , from http://www.lrrd.org/lrrd21/3/boss21033.htm