TY  - RPRT
TI  - Deep Drilling and Sampling via the Wireline Auto-Gopher Driven by Piezoelectric Percussive Actuator and EM Rotary Motor
AU  - Bar-Cohen, Yoseph
AU  - Badescu, Mircea
AU  - Sherrit, Stewart
AU  - Zacny, Kris
AU  - Paulsen, Gale L
AU  - Beegle, Luther
AU  - Bao, Xiaoqi
PY  - 2012
UR  - https://ntrs.nasa.gov/citations/20130000270
ID  - 20130000270
ER  -