Hien O, Diarra B, Dabire R, Wangrawa J, Sawadogo L. Effects of External Parasites on the Productivity of Poultry in the Traditional Rearing System in the Sub-humid Zone of Burkina Faso. Int. J. Poult. Sci. 2011;10(3):189–196. doi:10.3923/ijps.2011.189.196