@misc{indiciae08b337d6703d,
  title = {Versatile, low-cost, computer-controlled, sample positioning system for vacuum applications},
  author = {Vargas-Aburto, Carlos and Liff, Dale R.},
  year = {1991},
  url = {https://ntrs.nasa.gov/citations/19910022923},
  note = {Source identifier: 19910022923}
}