@misc{indiciaeac671352498b,
  title = {Mineral resources of the Rincon wilderness study area, Pima County, Arizona},
  author = {Charles H. Thorman and Harald Drewes and Michael Lane},
  year = {1981},
  doi = {10.3133/b1500},
  url = {https://pubs.usgs.gov/publication/b1500},
  note = {Source identifier: b1500}
}