@misc{indiciaece08f2738a52,
  title = {Copper Deposits in the Old Hat Mining District, Pima County, Arizona},
  author = {Nels P. Peterson and S. C. Creasey},
  year = {1943},
  doi = {10.3133/ofr4314},
  url = {https://pubs.usgs.gov/publication/ofr4314},
  note = {Source identifier: ofr4314}
}