@misc{indiciaeca2d5efd7364,
  title = {Geology, geochemistry, and mineralogy of the Ridenour Mine breccia pipe, Arizona},
  author = {K. J. Wenrich and E.R. Verbeek and H. B. Sutphin and P.J. Modreski and B. S. Van Gosen and D.E. Detra},
  year = {1990},
  doi = {10.3133/ofr90504},
  url = {https://pubs.usgs.gov/publication/ofr90504},
  note = {Source identifier: ofr90504}
}