@misc{indiciae4d7f07592b5b,
  title = {Surface-source downhole seismic analysis in R},
  author = {Eric M. Thompson},
  year = {2007},
  doi = {10.3133/ofr20071124},
  url = {https://pubs.usgs.gov/publication/ofr20071124},
  note = {Source identifier: ofr20071124}
}