@misc{indiciaee67f65eabe4b,
  title = {Geochemistry of Laramide and middle Tertiary plutons in the Ajo mining district, Pima County, Arizona},
  author = {Dennis P. Cox},
  year = {1988},
  doi = {10.3133/ofr88672},
  url = {https://pubs.usgs.gov/publication/ofr88672},
  note = {Source identifier: ofr88672}
}