Getachew T, Muktar Y, Mekonnen N and Tesma F 2016: Prevalence of gastrointestinal nematodes and efficacy of commonly used anthelmintics in different sheep breeds in Areka Agricultural Research Center, Areka, Ethiopia. Livestock Research for Rural Development. Volume 28, Article #117. Retrieved , from http://www.lrrd.org/lrrd28/6/mukt28117.html