@misc{indiciae95447413ce4d,
  title = {Spectral induced polarization measurements at the main iron incline mine dump near Leadville, Colorado},
  author = {D. L. Campbell},
  year = {2001},
  doi = {10.3133/ofr01315},
  url = {https://pubs.usgs.gov/publication/ofr01315},
  note = {Source identifier: ofr01315}
}