@misc{indiciae43f8045d8bf5,
  title = {Geochemical data for the Ajo two-degree quadrangle, Arizona},
  author = {H. N. Barton and P. K. Theobald and R. L. Turner and R. G. Eppinger and J. G. Frisken},
  year = {1982},
  doi = {10.3133/ofr82419},
  url = {https://pubs.usgs.gov/publication/ofr82419},
  note = {Source identifier: ofr82419}
}