For citations:
Lapina M.N., Kovaleva G.P., Sulyga N.V., Vitol V.A. Birth defects in first-calf heifers with the use of stud bulls with different index values of “calving ease”. International Journal of Veterinary Medicine. 2022;(4):374-379. (In Russ.) https://doi.org/10.52419/issn2072-2419.2022.4.374
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