@misc{indiciaef225328f439c,
  title = {Mineral deposit models; theory and practice},
  author = {Steve Ludington and Paul B. Barton and Kathleen M. Johnson},
  year = {1985},
  doi = {10.3133/ofr85391},
  url = {https://pubs.usgs.gov/publication/ofr85391},
  note = {Source identifier: ofr85391}
}