Risk and exploration [electronic resource] : earth, sea and the stars : NASA administrator's symposium, September 26-29, 2004, Naval Postgraduate School, Monterey, California / Steven J. Dick and Keith L. Cowing, editors.
Imprint
Washington, DC : National Aeronautics and Space Administration, Office of External Relations, NASA History Division, [2005]
Mode of access: Internet from the NASA History Office web site. Address as of 5/18/06: http://history.nasa.gov/SP-4701/riskandexploration.pdf; current access is available via PURL.
