@misc{indiciaee09cc2587b4c,
  title = {pick\_xwell, a program for interactive picking of crosswell seismic and radar data},
  author = {K.J. Ellefsen},
  year = {1999},
  doi = {10.3133/ofr99534},
  url = {https://pubs.usgs.gov/publication/ofr99534},
  note = {Source identifier: ofr99534}
}