Jenkins, Dennis R.; Tony Landis; Jay Miller (June 2003). "SP-2003-4531: American X-Vehicles: An Inventory, X-1 to X-50"(PDF). Monographs in Aerospace History, No. 31. NASA. p. 54. Archived from the original on 2020-04-25. Retrieved 2007-10-07.{{cite web}}: CS1 maint: bot: original URL status unknown (link)
