En
RuIgor Sikorsky
Igor Sikorsky
According to the legislative assumption of members of the State Duma on vacation of funds for issuing a premium engineer I. I. Sikorskoye for the invention of the aircraft
Council of Ministers (1905-1917).According to the legislative assumption of members of the State Duma on the vacation of funds for issuing a premium engineer I. I. Sikorsky for the invention of the aircraft.
1914.
Federal State Institution "Russian State Historical Archive" (RGIA)
Russian air bogatyri I. I. Sikorsky
Finn, Konstantin Nikolaevich (1878-1956).Russian Bogatyri I. I. Sikorsky.Belgrade: [b.and.], 1930.
1930.
NB Garf.