TY  - RPRT
TI  - Candidate thruster technologies for NEP
AU  - Brophy, J.
AU  - Oelson, S.
AU  - Hrbud, I.
AU  - Polk, J.
PY  - 2002
UR  - https://ntrs.nasa.gov/citations/20060029732
ID  - 20060029732
ER  -