TY  - RPRT
TI  - Penetrator Coring Apparatus for Cometary Surfaces
AU  - Braun, David F.
AU  - Heinrich, Michael
AU  - Ai, Huirong Anita
AU  - Ahrens, Thomas J.
PY  - 2004
UR  - https://ntrs.nasa.gov/citations/20040062104
ID  - 20040062104
ER  -