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by Penn, B. G., 1947-
[Marshall Space Flight Center, Ala.] : [Springfield, Va.] : National Aeronautics and Space Administration, George C. Marshall Space Flight Center ; [For sale by National Technical Information Service], 1986
[Marshall Space Flight Center, Ala.] : [Springfield, Va.] : National Aeronautics and Space Administration, George C. Marshall Space Flight Center ; [For sale by National Technical Information Service], 1986
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