Swift's 500 Gamma-ray Bursts - Goddard Multimedia Item 10590
http://svs.gsfc.nasa.gov/vis/a010000/a010500/a010590/index.html
NASA's Swift Catches 500th Gamma-ray Burst
http://www.nasa.gov/mission_pages/swift/bursts/500th.html
NASA's Swift catches 500th gamma-ray burst
http://www.sciencedaily.com/releases/2010/04/100419173012.htm
NASA's Swift catches 500th gamma-ray burst
http://www.physorg.com/news190916660.html
Swift Catches 500th Gamma-ray Burst - redOrbit
http://www.redorbit.com/news/space/1852155/swift_catches_500th_gammaray_burst/index.htmlNASA's Swift catches 500th gamma-ray burst
http://www.eurekalert.org/pub_releases/2010-04/nsfc-nsc041910.php
28. The Swift Gamma Ray Burst Explorer (Space/USA)
SWIFT - NASA
http://www.nasa.gov/mission_pages/swift/main/index.html
