Title: Russkie vozdushnye bogatyri I.I. Sikorskogo
Subjects: Aeronautical engineers, Biography, Ilʹi︠a︡ Muromet︠s︡ (Bomber), Military Aeronautics, Ilʹi͡a Muromet͡s (Bomber)
Places: Soviet Union
People: Igor Ivan Sikorsky (1889-1972)