@misc{indiciaeb422d115a9ab,
  title = {Vision-based range estimation using helicopter flight data},
  author = {Smith, Phillip N. and Sridhar, Banavar and Hussien, Bassam},
  year = {1992},
  url = {https://ntrs.nasa.gov/citations/19930037528},
  note = {Source identifier: 19930037528}
}