TY  - RPRT
TI  - NGC7009: Testing the Wind-Wind Interaction Formation of Planetary Nebulae
AU  - Chu, You-Hua
AU  - Gruendl, Robert
AU  - Guerrero, Martin
PY  - 2003
UR  - https://ntrs.nasa.gov/citations/20040004350
ID  - 20040004350
ER  -