@misc{indiciaecfcda33a171c,
  title = {Disseminated flake graphite and amorphous graphite deposit types. An analysis using grade and tonnage models},
  author = {David M. Sutphin and James D. Bliss},
  year = {1990},
  url = {https://pubs.usgs.gov/publication/70016144},
  note = {Source identifier: 70016144}
}