TY JOUR TI VARIETAL STUDY OF RARE DON AUTOCHTHONOUS TECHNICAL VARIETIES OF VITIS VINIFERA L. PONTICA NEGR. KW grapes KW ampelographic collection KW varietal study KW rare autochthonous Don varieties KW productivity KW harvest conditions KW wine tasting assessment KW wine characteristics JO Bulletin of KSAU AU Ganich, V.A. AU Naumova, L.G. AU Matveeva, N.V. PY 2022 IS 0 PB Krasnoyarsk State Agrarian University