TY JOUR TI ANALYSIS OF THE FRONTIER REGIONS OF THE SIBERIAN FEDERAL DISTRICT OF RUSSIA BY THE LEVEL OF SOCIO-ECONOMIC DEVELOPMENT (ON THE EXAMPLE OF THE REPUBLIC OF TYVA) KW JO Agrarian Bulletin of the AU Badarchi, H.B. AU Sevek, V.K. PY 2019 IS 183 PB Ural State Agrarian University