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by Air Force Research Laboratory
by Yeomans, Donald K.
by Congress, United States; Senate, United States; Commerce, Committee on
by United States Congress; United States House of Senate; Committee on Commerce
by Morris, Mike
by United States Congress; United States House of Representatives; Committee on Science and Technology 2007
by National Aeronautics and Space Administration
by Edited by Andrea Milani , Giovanni B. Valsecchi , David Vokrouhlicky