Şahin M, Çolak A, Otlu S, Aydın F, Genç O, Güler MA, Oral H. Studies on the Prevalence of Subclinic and Clinic Mastitis and Antibiotic Sensitivity in Imported Simmental Cows in Kars District. Kafkas Univ Vet Fak Derg, 3 (1): 49-55, 1997.