Dr. Alexander Klemin Award presented to Charles H. Zimmerman, Langley Aeronautical Laboratory, NACA at the Forum. Vertical Flight Society's (formerly American Helicopter Society - AHS) Annual Forum 12, 1956, May 2-5, 1956 at Washington, D. C., USA Source: Vertiflite (AHS Newsletter) April-May 1956 (Vol.2 No. 4)
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Klemin award to Charles H. Zimmerman at Forum12,1956

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Dr. Alexander Klemin Award presented to Charles H. Zimmerman, Langley Aeronautical Laboratory, NACA at the Forum.

Vertical Flight Society's (formerly American Helicopter Society - AHS) Annual Forum 12, 1956, May 2-5, 1956 at Washington, D. C., USA

Source: Vertiflite (AHS Newsletter) April-May 1956 (Vol.2 No. 4)

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