Columbia subject headings:
Harvard subject headings:
Aeronautical engineers--Soviet Union--Biography
Ilʹi︠a︡ Muromet︠s︡ (Bomber)
Sikorsky, Igor Ivan, 1889-1972
Princeton subject headings:
Aeronautical engineers--Soviet Union--Biography.
Ilʹi︠a︡ Muromet︠s︡ (Bomber)
Sikorsky, Igor Ivan, 1889-1972.