Epidemiological studies on coryne-bacterium ovis in sheep farms - Osama Elsaid Ibrahim Hassanien; Abdelhamid Zakaria Fahmy; Ehab Ali Helali; Faiez Mostafa Hassanien (Cairo : Osama Elsaid Ibrahim Hassanien, 1998)
Thesis (Ph.D.) - Cairo University - Faculty of Veterinary Medicine - Department of Veterinary Hygiene and Management