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3/4 FRONT VIEW OF HILLER H-23C (USA 56-2288). USE OF THE HILLER H-23 ...
3/4 FRONT VIEW OF HILLER H-23C (USA 56-2288). USE OF THE HILLER H-23 HELICOPTER AS AN AID IN ESTABLISHING SATISFACTORY FLYING QUALITIES & REQUIREMENTS FOR VTOL AIRCRAFT. Rotocraft Research. NASA SP Flight Re... More