@misc{indiciaecd8ebc3cbcdf,
  title = {Preliminary interpretation of a seismic-refraction profile across the Large Aperture Seismic Array, Montana},
  author = {C.A. Borcherdt and John C. Roller},
  year = {1968},
  doi = {10.3133/ofr6815},
  url = {https://pubs.usgs.gov/publication/ofr6815},
  note = {Source identifier: ofr6815}
}