@misc{indiciae95e13fb291b0,
  title = {ROPEC - ROtary PErcussive Coring Drill for Mars Sample Return},
  author = {Chu, Philip and Spring, Justin and Zacny, Kris},
  year = {2014},
  url = {https://ntrs.nasa.gov/citations/20150004061},
  note = {Source identifier: 20150004061}
}