ФИО:
Tret’yakov Evgeniy Aleksandrovich
About author:
the Federal State Budgetary Educational Institution of Higher Education the Vereshchagin State Dairy Farming Academy of Vologda
e-mail:
evgen-tretyakov@yandex.ru
the Federal State Budgetary Educational Institution of Higher Education the Vereshchagin State Dairy Farming Academy of Vologda