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 Dumoulin, Jim.  Project Mercury.   NASA: Mercury 7 Archives.   <http://science.ksc.nasa.gov/history/mercury/mercury.html>.

 Swenson, Lloyd S., et al.  This New Ocean: A History of Project Mercury.  NASA History Series. <http://www.hq.nasa.gov/office/pao/History/SP-4201/toc.htm>.