TY  - RPRT
TI  - Advanced Space Propulsion: A Research Perspective
AU  - Litchford, Ron
AU  - Cole, John
AU  - Rodgers, Steve
AU  - Sackheim, Bob
PY  - 2002
UR  - https://ntrs.nasa.gov/citations/20030054539
ID  - 20030054539
ER  -