00738naa#a2200181#i#450# EN\\bibl\19468 20260516033624.6 20260515b2026####ek#y0engy0150####ca RU FORMATION OF THE SPECIES AND BREEDING COMPOSITION OF THE GENUS BETULA L. EX SITU IN THE VORONEZH REGION Conference article/thesis Voronezh FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov 2026 5 с. Conference article/thesis local Условия существования растений. 630.181 Boltnev I. A. Koltunova L. I. Isakov Igor Yur'evich bibl.vgltu.ru