KONOVALOVA, Elena Nickolaevna et al. CONGENITAL DEFECTS OF BEEF CATTLE BREEDS AND GENERAL PRINCIPLES OF THEIR PREVENTION. Journal of Agriculture and Environment, [S.l.], n. 2 (3), aug. 2017. ISSN 2564-890X. Available at: <http://jae.cifra.science/article/view/56>. Date accessed: 25 may 2018. doi: http://dx.doi.org/10.23649/jae.2017.2.3.1.