@misc{indiciaefa5c2882daf3,
  title = {Maps showing anomalous concentrations of zinc, silver, antimony, manganese, barium and strontium in stream sediment and heavy-mineral concentrate from parts of the Ajo and Lukeville 1 degree by 2 degrees quadrangles, Arizona},
  author = {P. K. Theobald and H. N. Barton},
  year = {1988},
  doi = {10.3133/mf1834e},
  url = {https://pubs.usgs.gov/publication/mf1834E},
  note = {Source identifier: mf1834E}
}