@misc{indiciaecb3ba79a0d0d,
  title = {Geoelectrical laboratory and field studies of materials from the Tucson Mine Dump near Leadville, Colorado},
  author = {David L. Campbell and Robert Horton},
  year = {2000},
  doi = {10.3133/ofr00312},
  url = {https://pubs.usgs.gov/publication/ofr00312},
  note = {Source identifier: ofr00312}
}