Igor Sikorsky und der Hubschrauber
2007
Miscellaneous
Electronic Resource
Unknown
Igor Sikorsky - the Russian years
TIBKAT | 1988
|Igor Sikorsky - the Russian years
TIBKAT | 1987
|Igor Sikorsky - the Russian years
SLUB | 1987
|Igor Sikorsky Defines the Crane Helicopter
AIAA | 2010
|The aviation careers of Igor Sikorsky
TIBKAT | 1989
|