00535naa#a2200169#i#450# EN\\bibl\95764 20250416001245.3 2413-046X 20250331b2025####ek#y0engy0150####ca RU TRENDS IN DAIRY CATTLE DEVELOPMENT IN THE LENINGRAD REGION Journal article Moscow Electronic science 2025 13 с. Journal article local Молочная промышленность в целом. 637.1 Golovnev Dmitriy Viktorovich qje.su