TY - RPRT TI - The Space Station Freedom evolution-phase - Crew-EVA demand for robotic substitution by task primitive AU - Smith, Jeffrey H. AU - Estus, Jay AU - Heneghan, Cate AU - Nainan, Charles PY - 1989 UR - https://ntrs.nasa.gov/citations/19890066085 ID - 19890066085 ER -