@misc{indiciaea598325a211e,
  title = {Advances in directional borehole radar data analysis and visualization},
  author = {D.V.G. Smith and P.J. Brown},
  year = {2002},
  doi = {10.1117/12.462230},
  url = {https://pubs.usgs.gov/publication/70025114},
  note = {Source identifier: 70025114}
}