29th Annual National V/STOL Forum proceedings, Washington, D.C., May 1973
Annual National V/STOL Forum of the American Helicopter Society ; 29 ; 1973 ; Washington, DC Annual National V/STOL Forum of the American Helicopter Society ; 29 (Washington, DC) : 1973.05.
1973
Getr. Zählung
Ill., graph. Darst
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