For citations:
Abilov A.I., Kozmenkov P.L., Bogolyubova N.V., Ustimenko A.V. Biochemical characteristics of calves of the Holstein breed of different age groups in winter. Agrarian science. 2023;(6):22-28. (In Russ.) https://doi.org/10.32634/0869-8155-2023-371-6-22-28
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