Forum 13
Washington, D.C., USA | May 8-11, 1957
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Forum 13 Awards, 1957
Vertical Flight Society's (formerly American Helicopter Society - AHS) Annual Forum 13, May 8-11, 1957, Washington, D. C., USA
Vertical Flight Society's (formerly American Helicopter Society - AHS) Annual Forum 13, May 8-11, 1957, Washington, D. C., USA