@misc{indiciaef161d1135df4,
  title = {Shallow electromagnetic surveys of an abandoned bunker, Denver Federal Center, Colorado},
  author = {J.C. Eckhart},
  year = {1998},
  doi = {10.3133/ofr98613},
  url = {https://pubs.usgs.gov/publication/ofr98613},
  note = {Source identifier: ofr98613}
}