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Irving, Katrina. "Gendered space, racialized space: nativism, The Immigrant Woman and Stephen Crane's Maggie." College Literature 20(3) (1993): 30-43.
Stephen Crane’s "Maggie: A Girl of the Streets"
Rogers Commission, "Report of the Presidential Commission on the Space Shuttle Challenger Accident," (Volume IV - Hearings of the Presidential Commission on the Space Shuttle Challenger Accident: February 6, 1986 to February 25, 1986), http://history.nasa
Space Shuttle - Unsafe at Any Cost?
"The Hubble Space Telescope." Internet. National Aeronautics and Space Administration. January 21, 2005. Accessed April 18, 2005. http://hubble.
The Hubble Space Telescope
Long-Duration Space Flight Microgravity Musculoskeletal System Countermeasures www.space.edu/LibraryResearch/abstracts/jensen/jparker.html
Human Physiology in Space
Spudis, Paul D. "Humans Should Explore Space." Part of Scientific American Debate on Who Should Explore Space? Robots vs. Humans. April 18, 1999. Reproduced in Encyclopedia Encarta, CD ROM Version, 2003
History of the U.S. Space Program
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