@misc{indiciaeee36fe252f64,
  title = {Geophysical logs from a copper oxide deposit, Santa Cruz Project, Casa Grande, Arizona},
  author = {Philip H. Nelson},
  year = {1991},
  doi = {10.3133/ofr91357},
  url = {https://pubs.usgs.gov/publication/ofr91357},
  note = {Source identifier: ofr91357}
}