Kovalchuk, I.V., Holenia, Y.H., Kovalchuk, I.I. and Roivskyi, O.I. 2022. ACCELERATED SYSTEM OF CALVES BREEDING AS A FACTOR OF ENSURING THEIR DEVELOPMENT AND SECURITY. Bulletin of Sumy National Agrarian University. The series: Livestock. 1 (Jul. 2022), 26-30. DOI:https://doi.org/10.32845/bsnau.lvst.2022.1.4.