TY - RPRT TI - Developing a Crew Time Model for Human Exploration Missions to Mars AU - Battfeld, Bryan AU - Stromgren, Chel AU - Shyface, Hilary AU - Cirillo, William AU - Goodliff, Kandyce PY - 2015 UR - https://ntrs.nasa.gov/citations/20150009469 ID - 20150009469 ER -