NASA "NASA Headquarters"<http://www.hq.nasa.gov/> (May 7 2002)

Dr. David R. Williams "Apollo 11 Lunar Module EASEP "2001-07-18 <http://nssdc.gsfc.nasa.gov/database/MasterCatalog?sc=1969-059c> (May 6 2002)

Elvia Thompson "NASA" May 6 2002 <http://www.nasa.gov/> (May 7 2002)
                                                                                                            

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