Betterton, Eric A. (2003). "Environmental Fate of Sodium Azide Derived from Automobile Airbags (Abstract)". Critical Reviews in Environmental Science and Technology. 33 (4): 423–458. doi:10.1080/10643380390245002. S2CID96404307.
Betterton, Eric A. (2003). "Environmental Fate of Sodium Azide Derived from Automobile Airbags (Abstract)". Critical Reviews in Environmental Science and Technology. 33 (4): 423–458. doi:10.1080/10643380390245002. S2CID96404307.
shuttlepresskit.com
"Main Propulsion System (MPS)"(PDF). Shuttle Press Kit.com. Boeing, NASA & United Space Alliance. October 6, 1998. Archived from the original(PDF) on 2012-02-04. Retrieved December 7, 2011.
"Main Propulsion System (MPS)"(PDF). Shuttle Press Kit.com. Boeing, NASA & United Space Alliance. October 6, 1998. Archived from the original(PDF) on 2012-02-04. Retrieved December 7, 2011.