https://www.encyclopediaofukraine.com/display.asp?page=2&ffpath=page=3&ffpath=page=2&ffpath=pages%5CH%5CR%5CHrinchenkoBorys.htm
Hrinchenko, Borys
hrinchenkoborys
https://hamchenko-archive.iananu.digital/en/letter-to-s-s-hamchenko-from-v-a-hrinchenko-dated-by-september-8-1928/
Letter to S.S. Hamchenko from V.A. Hrinchenko dated by September 8, 1928 – Digital Memory Storage
v adigital memoryletterhrinchenkodated