@misc{indiciae184e808a889b,
  title = {On autonomous terrain model acquistion by a mobile robot},
  author = {Rao, N. S. V. and Iyengar, S. S. and Weisbin, C. R.},
  year = {1987},
  url = {https://ntrs.nasa.gov/citations/19890017112},
  note = {Source identifier: 19890017112}
}