@misc{indiciae0c69e63b0f58,
  title = {GSMODS; a personal mineral occurrence database system reference manual, version 1.01},
  author = {B. R. Johnson},
  year = {1987},
  doi = {10.3133/ofr87636},
  url = {https://pubs.usgs.gov/publication/ofr87636},
  note = {Source identifier: ofr87636}
}