TY JOUR TI THE FIRST MONASTERIES IN TUVA UNDER TIBETAN SOURCES KW Tuva KW religion KW Buddhism KW Lamaism KW monasteries KW historiography KW archival documents KW Tibetan sources JO Socio-economic and humanitarian magazine AU Mongush, I.I. PY 2025 IS 0 PB Krasnoyarsk State Agrarian University