Daily News de Des Moines (Iowa), 17 avril 1917s1 Clark, J.: "mystery airplane, New Hampshire, 1917", Magonia Exchange, 14 août 2007
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By United Press.
BOSTON, April 17. That another aeroplane has been sighted flying over the Portsmouth, N.H., navy yard by national guardsmen, was reported in Boston today. It was rumored that some sort of an airplane base is located in the New Hampshire woods.
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