%0 Book %T On NASA Policy for Planetary Protection: Letter Report %D 1985 %U https://nap.nationalacademies.org/catalog/12359/on-nasa-policy-for-planetary-protection-letter-report %> https://nap.nationalacademies.org/catalog/12359/on-nasa-policy-for-planetary-protection-letter-report %I The National Academies Press %C Washington, DC %G English %K Space and Aeronautics %P 2 %R doi:10.17226/12359