TLS signed “Eugene A. Cernan,” one page, 8 x 10.5, NASA letterhead, June 20, 1966. Letter to Mr. and Mrs. Milton Donner, in full: "Many thanks for your kind congratulatory message on the success of our GT-9 mission. I am very thankful and grateful that I could be a part of this important flight. Thanks again for your thoughtfulness and my best wishes to you for the future." In fine condition. Accompanied by the original NASA mailing envelope.
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