ФИО:
Val’kovskaya Natalya Vital’evna
About author:
The Federal State Budgetary Educational Institution of Higher Education the Vereshchagin State Dairy Farming Academy of Vologda
e-mail:
natalya-valkovsk@mail.ru
The Federal State Budgetary Educational Institution of Higher Education the Vereshchagin State Dairy Farming Academy of Vologda