TY JOUR TI IMPORT SUBSTITUTION AS A CONDITION FOR FOOD SECURITY KW import substitution KW food security KW agriculture KW exports KW imports KW the Republic of Tatarstan JO Vestnik of Kazan State Agrarian University AU Barsegyan, N.V. AU Shinkevich, A.. PY 2017 IS 11 PB Kazan state agrarian University