Swenson, Loyd S. Jr.; Grimwood, James M.; Alexander, Charles C. (1989). "This New Ocean: A History of Project Mercury". NASA History Series (NASA Special Publication-4201). Archived from the original on 13 July 2009. Retrieved 16 April 2015.
Swenson, Loyd S. Jr.; Grimwood, James M.; Alexander, Charles C. (1989). "This New Ocean: A History of Project Mercury". NASA History Series (NASA Special Publication-4201). Archived from the original on 13 July 2009. Retrieved 16 April 2015.