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Wade, Mark. "1MS". Encyclopedia Astronautica. Archived from the original on 12 October 2008. Retrieved 23 May 2009.
Wade, Mark. "Kosmos 2". Encyclopedia Astronautica. Archived from the original on 18 June 2012. Retrieved 23 May 2009.
Wade, Mark. "MS". Encyclopedia Astronautica. Archived from the original on 9 March 2002. Retrieved 23 May 2009.