Threats from space : a review of U.S. government efforts to track and mitigate asteroids and meteors (part I and part II) : hearing before the Committee on Science, Space, and Technology, House of Representatives, One Hundred Thirteenth Congress, first session, Tuesday, March 19, 2013 and Wednesday, April 10, 2013.
|Format:||Government Document Online Book|
U.S. Government Printing Office,
|Online Access:||ONLINE VERSION|
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