For citations:

Mukiy Y.V., Serikova Y.M. Comparative assessment of the dynamics of milk productivity of black and white holstinized breed cows over five years on a farm in the Leningrad region. International Journal of Veterinary Medicine. 2022;(4):211-216. (In Russ.) https://doi.org/10.52419/issn2072-2419.2022.4.211