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.
Publication Info.
Washington : U.S. Government Printing Office, 2013.
Washington, DC : For sale by the Superintendent of Documents, U.S. Government Printing Office
