For citations:
Abilov A.I., Shemetyuk S.A., Pyzhova E.A., Dunin M.I. Age-related and seasonal dynamics of sperm production of Aberdeen-Angus bull sires. Agrarian science. 2020;3(3):35-38. (In Russ.) https://doi.org/10.32634/0869-8155-2020-336-3-35-38
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