@misc{indiciaed9000169bc7a,
  title = {Preliminary results of induced polarization-resistivity surveys in the Northgate district, Colorado},
  author = {Gordon Robert Francis Johnson},
  year = {1971},
  doi = {10.3133/ofr71159},
  url = {https://pubs.usgs.gov/publication/ofr71159},
  note = {Source identifier: ofr71159}
}