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Assessment of planetary protection requirements from Mars sample return missions

National Research Council Committee on the Review of Planetary Protection Requirements for Mars Sample Return Missions ; National Research Council ; Space Studies Board ; Division on Engineering and Physical Sciences ; National Academies Press. | Washington : The National Academies Press | 2009

NASA maintains a planetary protection policy to avoid the forward biological contamination of other worlds by terrestrial organisms, and back biological contamination of Earth from the return of extraterrestrial materials by spaceflight missions[...]

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