Nigusu, K., & Fentie, T. (2012). Prevalence and Causes of Selected Respiratory Infections in Indigenous Gumuz Sheep in Metema District, Northwest Ethiopia. International Journal of Sciences: Basic and Applied Research (IJSBAR), 5(1), 14-20. https://www.gssrr.org/JournalOfBasicAndApplied/article/view/1292