@misc{indiciae62a5bb0fb812,
  title = {A comparison of phase inversion and traveltime tomography for processing near-surface refraction traveltimes},
  author = {Karl J. Ellefsen},
  year = {2009},
  doi = {10.1190/1.3196857},
  url = {https://pubs.usgs.gov/publication/70199992},
  note = {Source identifier: 70199992}
}