Bette Siegel

NASA's path to planetary protection requirements for human exploration missions: Update on recent progress

James E. Johnson, J. Andy Spry, Margaret S. Race, 2016, 2016 IEEE Aerospace Conference.

Planetary Protection Knowledge Gaps for Future Mars Human Missions: Stepwise Progress in Identifying and Integrating Science and Technology Needs

J. Andy Spry, Margaret S. Race, Bette Siegel, 2018 .

Planetary protection for human missions to Mars: A forward look

J. Andy Spry, Bette Siegel, Margaret S. Race, 2018 .

Planetary Protection Concepts in the Context of the Evolvable Mars Campaign

J. Andy Spry, Margaret S. Race, Bette Siegel, 2015 .

A Path to Planetary Protection Requirements for Human Exploration: A Literature Review and Systems Engineering Approach

Bette Siegel, James Johnson, Cassie Conley, 2015 .

Planetary Protection Knowledge Gaps and Enabling Science for Human Mars Missions

Bette Siegel, Tullis Onstott, Petra Rettberg, 2021 .