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Earth observations from space history, promise, and reality : executive summary

Washington, D.C. : National Academy Press, c1995. 1995

Exploring Mars and beyond : what's next for U.S. planetary science : hearing before the Subcommittee

United States. Congress. House. Committee on Science, Space, and Technology (2011). Subcommittee on Space and Aeronautics.
Washington : U.S. G.P.O. : For sale by the Supt. of Docs., U.S. G.P.O., 2012. 2012

The growth of global space capabilities : what is happening and why it matters : hearing before the

United States. Congress. House. Committee on Science and Technology (2007). Subcommittee on Space and Aeronautics.
Washington : U.S. G.P.O. : For sale by the Supt. of Docs., U.S. G.P.O., 2010. 2010

Strengthening NASA's technology development programs : hearing before the Subcommittee on Space and

United States. Congress. House. Committee on Science and Technology (2007). Subcommittee on Space and Aeronautics.
Washington : U.S. G.P.O. : For sale by the Supt. of Docs., U.S. G.P.O., 2010. 2010