TY  - RPRT
TI  - A large bubble around the Crab Nebula
AU  - Romani, Roger W.
AU  - Reach, William T.
AU  - Koo, Bon Chul
AU  - Heiles, Carl
PY  - 1990
UR  - https://ntrs.nasa.gov/citations/19900037457
ID  - 19900037457
ER  -