Title: Zarozhdenie i razvitie ėkspluatat︠s︡ionno-tekhnicheskoĭ sluzhby Voenno-vozdushnykh sil RKKA v mezhvoennyĭ period (1921-1941 gg.)
Subjects: History, Military Airplanes, Design and construction, Soviet Union. Voenno-Vozdushnye Sily, Soviet Union, Military Aeronautics, Air forces. Air warfare, Military science, Military engineering, Weapons