Zewdie Wondatir. “Study on the Occurrence of External and Gastrointestinal Parasites and Sub-Clinical Mastitis on Crossbred Dairy Cows under Different Feeding and Management Conditions in the Central Highlands of Ethiopia”. Global Journal of Science Frontier Research 14, no. D7 (May 15, 2014): 37–40. Accessed May 4, 2024. https://journalofscience.org/index.php/GJSFR/article/view/1394.