KHMELNYCHYI , S.; KARPENKO , B.; BARDASH , D. PECULIARITIES OF DEVELOPMENT OF UKRAINIAN REPAIR HEIFERS RED-AND-WHITE AND BLACK-AND-WHITE DAIRY BREEDS IN FARMS OF SUMY REGION. Bulletin of Sumy National Agrarian University. The series: Livestock, n. 2 (41), p. 18-23, 26 Oct. 2020.