@misc{indiciae0f28ebc9b671,
  title = {Transcontinental geophysical survey (35°-39° N) seismic refraction profiles of the crust and upper mantle from 87° to 100° W longitude},
  author = {D. H. Warren},
  year = {1968},
  doi = {10.3133/i534d},
  url = {https://pubs.usgs.gov/publication/i534D},
  note = {Source identifier: i534D}
}