NASA human spaceflight past, present, and future : where do we go from here? : hearing before the Committee on Science, Space, and Technology, House of Representatives, One Hundred Twelfth Congress, first session, Thursday, September 22, 2011.
Imprint
Washington : U.S. G.P.O. : For sale by the Supt. of Docs., U.S. G.P.O., 2012.
