Dobrolyot, or sometimes Dobrolet (abbrevation for Российское общество Добровольного воздушного флота/The Russian Society of Voluntary Air Fleet), an early Soviet Union air transport organisation, which was formed in 1923 and existed throughout the remainder of the 1920s. It was formed in...
history of dobrolyot
history of russian society of voluntary air fleet
историяобществадобровольноговоздушногофлота
российское общество добровольноговоздушногофлота