@misc{indiciaea791a5188cba,
  title = {Maps showing nonmetallic mineral deposits in the Tucson area, Arizona},
  author = {R. T. Moore and W. C. Jones and J. W. Peterson},
  year = {1974},
  doi = {10.3133/i844j},
  url = {https://pubs.usgs.gov/publication/i844J},
  note = {Source identifier: i844J}
}