StarChild: Alan Shepard - Biography of one of seven men chosen from over 500 candidates to be a member of the first group of astronauts in 1959. - http://starchild.gsfc.nasa.gov/docs/StarChild/whos_who_level2/shepard.html
Shepard, Alan Bartlett, Jr. - Brief biography from Fact Monster. - http://www.factmonster.com/ce6/people/A0844849.html
Wikipedia - Alan Shepard - Encyclopedia article includes information on the naval and astronaut career of the first man in space. - http://en.wikipedia.org/wiki/Alan_Shepard
Shepard - Biography and personal data from Encyclopedia Astronautica. - http://www.astronautix.com/astros/shepard.htm
Rear Admiral Alan B. Shepard, Jr - Brief biography provided by the First Flight Society. - http://www.firstflight.org/shrine/alan_shepard.cfm
Alan B. Shepard, Jr. - Biographical data provided by NASA. - http://www.jsc.nasa.gov/Bios/htmlbios/shepard-alan.html
Adm. Alan Shepard, Jr. - A biography and 1991 interview with the first American to go into space. - http://www.achievement.org/autodoc/page/she0int-1