638
638
Сорокин В.Н. Указ. соч. С. 270; Vitarbo G. Army of the Sky. Russian Military Aviation Before the Great War, 1904–1914. N.Y.; Washington, 2012. P. 60.
638
Сорокин В.Н. Указ. соч. С. 270; Vitarbo G. Army of the Sky. Russian Military Aviation Before the Great War, 1904–1914. N.Y.; Washington, 2012. P. 60.