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N650UG. Douglas DC-9-31. (47418-570)
N650UG. Lewis Research Center - in the standard livery at Tucson Airport, June 1994. (R. N. Smith Collection Copyright Image 1135-242.)
N650UG. NASA Lewis Research Center - in the standard livery at Tucson Airport, December 1996. (R. N. Smith Collection Copyright Image 1135-021.)
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