@misc{indiciae203dbf3d02b3,
  title = {Seismic Images Beneath the Bottomless Pits (Continental) Area of Flagstaff, Arizona},
  author = {Rufus Douglas Catchings},
  year = {1997},
  doi = {10.3133/ofr9776},
  url = {https://pubs.usgs.gov/publication/ofr9776},
  note = {Source identifier: ofr9776}
}