Forum 27
Washington, D.C., USA | May 19-21, 1971
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Forum 27, 1971
American Helicopter Society's (now Vertical Flight Society) 27th Annual Forum and Technology Display, held May 19-21, 1971 at Washington, D.C., USA
American Helicopter Society's (now Vertical Flight Society) 27th Annual Forum and Technology Display, held May 19-21, 1971 at Washington, D.C., USA
