Osnovy letnoĭ ėkspluatat︠s︡ii vertoletov : aėrodinamika /
Volodko, A. M.(Aleksandr Mikhaĭlovich)
Erickson, John,1929-2002,former owner.StEdNL
Erickson, Ljubica,former owner.StEdNL
Moskva : Transport,
1984.
Bibliography.
John and Ljubica Erickson collection.
Helicopters